Tag Archives: fermentation

  • Kombucha Heat Mats are Back




    Heat mats are back, and better than ever!

    As many of our customers know, heat mats have been out of stock for a while. Our original 1-gallon heat mats were made in China, one of the last of our items made outside the US. As practical and affordable as they were, they very often did not last long. In our search for quality American-made heat mats, we found a small company in West Wareham, MA. They not only produce exactly what we are looking for, but do so at a very reasonable price.


    Let us introduce you to the new mats:


    Kombucha Heat Mat, Small - This 12 by 4 inch mat is designed for a 1/2- or 1-gallon glass jar. With the option to add another foot of length to the mat, you can heat an additional vessel when you place the jars on top. Pictured above.


    Kombucha Heat Mat, Large - This 12 by 6 inch mat is designed for a larger brewing vessel, perfect for a 1-gallon crock. With the option to add 1 foot of length, it is perfect for a 2-gallon or 3-gallon crock; with 2 extra feet, it is perfect for a 5-gallon crock.





    Each mat can effectively raise the temperature of your brew by 10°F. By insulating the outside of the mat with a towel, you can increase the temperature by 5-10°F.

    Heating will be essential to your brews this winter, so make sure you've got a heat mat to keep your brew warm!

  • Brew Diagnosis Checklist: What We Need to Help


    Knowing your brew is doing well is vital. That’s why we are here to diagnose any concern you might have. We see hundreds of pictures every week from home brewers all over the world. In order for us to make a sound diagnosis there is a certain set of questions and pictures that will tell us what is going on. Here is a brew diagnosis checklist for you to complete before submitting a query.




    In making sure there is not a problem with a brew we need to see pictures. Luckily, taking and sending pictures is an easy every day activity. The ideal set consists of three images:


    AerialShotKOmbucha1. Aerial shot of entire brew surface showing SCOBY growth, if any.


      CloseUpKombucha2. Close up of surface highlighting any area of concern or general SCOBY growth.



    3. Profile shot of entire brew


    The more pictures the merrier. Don’t feel like these are the only shots you should send if you have the will to send more. In the event that there are still questions after viewing the photos we may request a couple more shots of any area of concern.




    With most inquiries we will ask the same set of questions. The answers will give us a reason for an issue if there is one and will help us guide you to make the necessary changes to your brew set up.


    1. What is the average temperature of the brew while it is fermenting?
    2. How long has it been fermenting?
    3. Where did the original SCOBY (mother, mushroom, culture) come from?
    4. How much starter liquid was used?
    5. What tea/blend and sweetener was used, and what quantity?


    We can almost know everything we need to know just from these five questions. As with pictures though, if there is something specific we need more information on, we will ask.


    As you can see diagnosing a brew is just as easy as brewing. With only a few simple steps we will gladly tell you what’s going on. In 95% of the cases we see, when using a proper set up there is nothing actually going on, just a new brewer needing some confirmation on their brew.

  • Kombucha Brewing: Starting From a Commercial Bottle, pt. 1


    In making kombucha, starting from a commercial bottle of kombucha was not a bad idea 5 years ago but the industry has changed. The day of the small micro-kombucha brewery making unfiltered, raw kombucha is coming to an end.


    These days, many breweries are using additives and filtration processes to help control the fermentation process - a standard practice in the commercial brewing world for established industries like beer and wine. Sure, it can be a relatively inexpensive way to get going, but you may be propagating something you didn't intend. For this reason, it is best to start a batch of kombucha using a fresh, straight-from-the-fermenter SCOBY.


    Think about it like this. A town of 5,000 trying to build a new meeting hall will have a hard time not building more than a room with four walls.


    A town of 5,000,000 will be able to not just build a room with four walls but a whole structure full of rooms, passageways and fun things to do (definitely an amazing kitchen).


    The same can be said for a colony of kombucha microbes coming from a commercial bottle of kombucha (town of 5,000) and a fresh kombucha SCOBY and starter (town of 5,000,000). There is really no comparison. The fresh SCOBY will brew a potent delicious kombucha the first round, in the normal 10-14 days, where as the commercial brew starter may not even form a new SCOBY let alone ferment a perfect batch in 10 days.



    We get photos all the time of peoples brews that have molded after trying to start a batch with a bottle of the popular brands of kombucha.


    Don’t waste your time or ingredients trying to build a colony from a subpar SCOBY. Start with a lab-grown, fermenter-fresh SCOBY and get perfect brews right away. Because let's get real, who wants to wait more than 10 days for their ‘buch?


    Stay tuned for Starting from a Commercial Bottle, pt. 2!

  • Hops and Kombucha: Not Just for Beer Anymore


    Hops and kombucha, Kombucha Brooklyn


    We go on and on about flavoring kombucha, and have covered both pre- and post- fermentation flavoring. We've espoused a different approach than, generally, store-bought kombuchas have taken.


    But there's one avenue we haven't covered yet, and that's the use of the glorious herb that is hops in flavoring your kombucha. We've found that the combination of hops and kombucha makes an exceptional spicy, dry and floral kombucha whose thirst-quenching ability is second to none. For a couple of years we've gotten our hops from Wrobel Farms, in Bridgewater, NY and have been very pleased to use their whole cone and pellet cascade hops in our keg program's 'buch.


    Dry Hopping


    The approach we've taken with hops and kombucha is to "dry hop" it - that means that the hops are added to the kombucha after we've steeped the tea. Unlike our love for using herbs in the tea infusion, we've been leaving the hops out of this stage.


    Hops and kombucha, Kombucha Brooklyn


    Generally, in beer brewing, it's common to add hops during the boiling process to contribute a bitter aspect - this can be early on in the boil, or at the end of the boil, depending on the amount of bitterness desired in the final brew. This does reduce the amount of volatile hop oils in your brew, but the addition of hops after the boil has become commonplace as well, and it is this practice we label "dry hopping." The end result is that the hops contribute an intensely hoppy essence to your brew, with a deeply floral aspect that is incomparable to boiled hops, which will have lost much of the volatile oil originally present in the herb.


    On the whole, hop with low alpha-acid ratings are chosen for dry-hopping, since they will have less of a bittering effect on the brew, and will contribute more highly floral and aromatic notes.


    When we're dry-hopping our kombucha, we simply add the hops to a vessel containing kombucha for secondary fermentation. For a 32-oz growler, adding 3 grams of whole cone hops gives your brew a nice, strong flavor.


    Consider this approach: add 12 grams whole cone hops, per gallon, to kombucha that is finished with primary fermentation. Allow to sit in the refrigerator for at least a week. After a week, strain out the hops, distribute into bottles, and allow to undergo secondary fermentation.


    Remember, though that you should monitor your secondary fermentations with a plastic bottle so you can observe the carbonation taking place in all of your glass bottles. Read more on this simple process here.


    Hops and kombucha, Kombucha Brooklyn


    So - get some 'buch going, and spice it up with some hops!


    Hoppy brewing!


    *Click here to purchase these same hops from our website*


  • Kombucha Recipes: 4 Brews That Rule


    We get so many questions on how to make kombucha, when sometimes all you need is a delicious recipe! We hope you tried Ruby Daydream - but here are a few more kombucha recipes to whet your appetite for killer 'buch.


    All recipes below are for a 1-gallon brew.


    Deep Purple


    Deep Purple, Kombucha Brooklyn


    This is an old school blend that saw its heyday at the New Amsterdam Market at Manhattan's South Street Seaport. We made it only a few small batches in a collaboration with our friends at Runa, a company that distributes the delicious Amazonian energizing herb guayusa. We've done lots of brewing with yerba mate, and guayusa is its cousin. The result tasted reminiscent of grapes and flowers, which is where this tasty brew got its name.



    • 7 grams gunpowder green tea (though any unflavored green tea will do)
    • 6 grams guayusa
    • 1 gram lavender


    Allow to ferment until it's reached a nice balance of sweetness and acidity. You likely won't see incredible SCOBY growth from this blend, but of course that isn't necessary to make great 'buch ;-).


    Velvet Smoke


    We got the idea for this one when making a Motley Brü. The Motley Brü is pretty much as it sounds - leftover, unlabeled and orphaned tea is steeped and brewed into a kombucha that can usually never be recreated. One particular blend of this variety contained some Lapsang Souchong, resulting in an incredibly smokey 'buch. Thinking we could balance it out, Velvet Smoke was born. By pulling back on the amount of the smoked tea and supplanting it simply with English breakfast tea, and softening the whole number with some soothing chamomile we were able to create one of the most pleasant small batch brews ever.



    • 8 grams English Breakfast tea
    • 4 grams Lapsang Souchong
    • 2 grams chamomile


    Like any brew, ferment until balance is achieved. Allow to undergo secondary fermentation to impart refreshing effervescence, chill and serve. Strange but fantastic, this will be a classic in your 'buch repertoire.




    This brew is a real crowd pleaser. If you've ever tasted pineapple tepache, popular in Mexico and Central America, you have an idea of what this recipe will turn out like. Fermented with black tea and herbal chai, it's finished in secondary fermentation with pineapple juice. The result is a citrus-fruity, spicy 'buch that cuts through the summer heat.



    • 12 grams English Breakfast tea
    • 3 grams herbal chai tea (use regular chai if you don't have herbal)

    With this brew, you will be able to let it ferment a little bit longer than normal - maybe a bit past the sweet/acid balance.


    Secondary fermentation:


    Add 3 oz of pineapple juice to a 16 ounce bottle, and fill the rest with the fermented English Breakfast / chai mix. Use the same ratio for other bottle sizes. Allow to become effervescent, but fill the exact same mix into a plastic bottle so you can use it as a model for the carbonation being built up in your glass bottles. Once carbonated, refrigerate and enjoy.




    This one is a throwback to a bygone era when information on 'buch was few and far between. I was fermenting with way too much tea per gallon (48g!), but my did the linen closet 'buch flow like wine. Big into secondary fermentation flavoring, but not into the relatively plain flavors available at the store, I used two ingredients that were seasonal and readily available - strawberries and rosemary. Language can often give you hints at flavors to try, and these two words fit together so well I had to make it. I'm glad I did.




    Honestly, steep whatever you've got. I'd recommend a blend of black, green and white tea, because strawberry is relatively overpowering and a nice backbone of black tea will maintain more of a tea flavor at the end of this brew. This one is all about secondary fermentation.


    Secondary Fermentation


    Here's where it gets fun. You're going to make a decoction of strawberries and rosemary. For one gallon, you'll want 1-2 cups of this mixture for flavoring your bottles. Dice up a handful of strawberries and add them to 24 oz boiling water, and a tablespoon of dried rosemary. Allow to simmer on low until the mixture has reduced by about half. Taste it periodically in case you need to add more rosemary. Be sure to bottle into plastic as well so you can tell when you've built up a good amount of carbonation. This is another hot day masterpiece that will turn the heads of your BBQ patrons!



    The recipes here have been developed with a spirit of fun and experimentation, as outlined in the blog Home Brewing Kombucha:  Think Outside the Box. Our tea blends Buffalo Soldier, Red Chai, Holy Diver, Easy Rider and Sunbather have been made in the same spirit. 


    Great kombucha can come from a bottle at the store, or on tap at a bar or restaurant, but the most satisfying 'buch in the world comes from your home, the product of chaos, courage, and enthusiasm. You're highly encouraged to try these recipes, but really we hope they are springboards for you to develop your own truly unique kombucha!

  • Auto-Siphon's Best Friend: The Auto-Siphon Clip


    You've got your best friend (the auto-siphon). You know how to take care of it. But really, the auto-siphon is a much needier friend than to rely simply on you. That's where the auto-siphon clip comes in.


    Auto-siphon clip Kombucha Brooklyn


    I thought I had single-handed siphon operation down, but when I discovered the clip I started to wonder what I was doing without it. Not only is it great for stabilizing the down tube, it makes it so I can make the siphon hover in the fermentation vessel just above sediment-level. That way I get less sediment in my bottles when I'm filling them, and I can be active with both hands just in case anything goes awry in bottling (when doesn't it...).


    Auto-siphon clip Kombucha Brooklyn


    After my contentment subsided in just using the clip, I realized another part of my routine that was about to receive an upgrade - drying my auto-siphon. Just laying it in the drying rack doesn't do much for it, you really need to hang it. So, I simply clipped it to my metro rack and voila! It's now an essential part of my 'buch brewing procedure.


    Auto-siphon clip Kombucha Brooklyn


    So if you're a regular 'buch brewer, and haven't discovered the wonders of the auto-siphon and its sidekick the auto-siphon clip, why not give them a try? You'll be glad you did.


  • Using an Auto Siphon: A Kombucha Brewer's Best Friend


    Auto siphon, Kombucha Brooklyn


    The auto siphon has become my favorite brewing implement for many reasons. It's saved my time and energy for years for the simple fact that it makes small batch brewing and farming SCOBYs faster and less laborious tasks.


    When transferring kombucha from brew vessel into bottle, I can think of no faster or cleaner method than using an auto siphon.


    Using an auto siphon, Kombucha Brooklyn


    Hydraulic little guy. Rinse and clean your auto siphon immediately to prevent any sticky, tenacious kombucha buildup in the tubes!


    You'll find many other uses for your auto siphon to seamlessly transfer liquids! So pick one up today and say goodbye to sloppy pours and time-wasting spills.

  • Choosing a Brewing Vessel


    Ceramic kombucha crocks, Kombucha Brooklyn

    While it's easy to brew kombucha in pretty much any container, it's an important decision to choose the best vessel you can find. Choosing a brewing vessel can make a huge difference in the quality, and of course quantity, of your kombucha brew. So, in an effort to clarify a few things for brewers new or seasoned, read below to find out more about these essential instruments.


    In choosing your brewing vessel, look for a few key characteristics:


    Stainless steel pot, Kombucha Brooklyn


    1. The vessel should be glassceramic, stainless steel (304 or brewer grade, not cooking grade) or wood. While many will say that food-grade plastic can be used, undesirable flavors often result from continued use of plastic. Glass is an inert material and will not allow the leaching of chemicals into your brew. If brewing in a ceramic vessel, be sure it is lead-free (the crocks that KBBK carries are lead-free and USA-made). Stainless steel is especially popular in commercial brewing environments and as such will work for home brewing as well. Some choose to brew in wooden barrels, which is also fine, and will contribute woody characteristics to your brew.
    2. The vessel should be wide-mouthed. The kombucha SCOBY requires that air be constantly exchanged with the outside environment, as it is constantly taking in oxygen and expelling CO2. A wide surface area ensures fast growth, as well as quick acidification of the tea. This results in a healthy culture. The wider the area for the culture to exchange gases, the more numerous are the antibacterial byproducts of SCOBY metabolism. Keep in mind that although your SCOBY will grow in tall, narrow-mouthed vessels, it will do so less vigorously.
    3. The size of the vessel is important, though not quite so much as the available surface area. Similar to the surface area, however, the more shallow the depth of liquid in the fermentation vessel, the faster the SCOBY grows and processes the tea into delicious kombucha.
    4. The shape of the vessel is a matter of personal preference, and the culture will take the shape of the container at the level of the liquid’s surface.
    5. Vessels with a spigot can be intermittently convenient but can also tend to cause headaches. While it may seem useful to use the spigot and not worry about using or cleaning an auto-siphon, or requiring precise pouring technique, brewers will find the spigot becoming periodically clogged with kombucha culture; you'll find yourself not using the spigot as frequently as you are using it.
      • Additionally, the materials from which the vessel's spigot is made could be contributing chemicals to your brew through leaching. As kombucha is very acidic, any substance that is reactive to such liquids can potentially release toxins into your brew (something interesting to consider when kombucha is a detoxifying drink). It's for precisely this reason that we advise against brewing in plastic, even BPA-free or food-grade plastic vessels.
      • An auto-siphon can be just as simple to use to extract kombucha, resists transfer of large chunks of culture, is easy to clean, and requires no relocation of the brewing vessel.


    Barrel, Beehive and pot, Kombucha Brooklyn


    Additional Considerations


    Ventilation is very important for your brewing vessel. Without proper ventilation, your brew's bacteria will be unable to access the oxygen they need to produce a nicely acidic kombucha. So, consider using fans in bigger brewing setups as well as completely porous (but not too porous) covers for your brewing vessel! Remember that cheese cloth is too porous and can allow fruit flies entry into your brew.


    Remember that it's not only kombucha that you can ferment in your vessels - pretty much any vegetable ferment (kimchi, sauerkraut) and some liquid ferments will work too - think kefir, mead, kvass etc. So, open up your horizons and start scouring flea markets, pawn shops, garage sales and antique malls for some sweet fermentation vessels!


  • 'Buch on Tap: Fall 2014

    As we dip into cooler temperatures and slip into warmer clothes, 'Buch on Tap has followed suit by providing our loyal customers delicious treats, both old and new.


    One of my favorite things is to see perennial flavors make their first appearance at new accounts. Just like the months differentiated by years, while the weather may be similar, the foliage is never exactly the same.


    Kombucha Brooklyn is in almost 50 accounts - Be sure to keep an eye on our Tap Map! It's constantly being updated as we continue to grow.



    Newest Accounts



    OG Perennial Flavors


    Big BlueCha leads the pack as a flavor to help carry you into fall. This recipe consists of blueberry and cinnamon. We have had it for over a month now and it has been turning heads like NYC models walking the streets after fashion week.


    Concord has made a big impression, and is currently the most popular flavor. Tannic and bright, yet leaving plenty of room for the Dragonwell Tea to come through. This flavor is going to be around for a while.


    T H E F U T U R E I S N O W H E R E


    We have returned with another installment of Kombucha with Premium Brewing Tea. This time, we are debuting Phoenix Mountain. It is made with a Dan Cong (meaning one bush) Oolong, heralding from the Guangdong province of China.

    Kombucha Brooklyn helps get you there Kombucha Brooklyn gets you there

    Phoenix Mountain is an exceptional showcase for the tea, which quite simply tastes like peach blossoms. On the surface, this is a delicious refreshing brew for customers. And just beneath, a story that tells itself with every sip.


    Dry Hop has been released into the wild! Featuring whole cone, Cascade hops from Wrobel Farms in Bridgewater, NY. The floral and citrus notes add a complementary body to this 'buch, with no bitterness from the long low temperature steep.


    KBBK's 'Buch on Tap is the non-alcoholic craft option for NYC. Ask for us on tap at your favorite spots - from beer halls, to cafes, or even at your office. We have a burgeoning corporate program to keep you fueled through the work day.


    Kombucha Brooklyn gets you there --

  • Steeping for Kombucha Brewing

    I've utilized many different methods of steeping for kombucha brewing, both at home and at Kombucha Brooklyn. Today I'm going to analyze the effectiveness of a few of those methods. I'll also suggest one that for the average home brewer may be the simplest, fastest and most efficient of those.


    Tea bags


    ... Tea bag of Earl Gray! Kombucha Brooklyn Steeping a tea bag of Earl Gray

    If there's one ubiquitous Western archetype of tea consumption, it involves the tea bag. Initially meant in the early 20th century to offer samples of loose leaf teas, the tea bag caught on and became very popular in use for making iced tea. My earliest memories of tea were of my dad using a dedicated coffee-maker to steep Lipton bags. He'd put the tea bags into the coffee carafe, pour water into the machine, and allow the hot water to flow down and immerse the bags for 3-5 minutes. After that, the tea was poured over lots of ice in a pitcher and thrown into the refrigerator.


    Fast and easy


    Some major advantages to the tea bag are simplicity and cost-effectiveness. It's very simple to toss some hot water on a tea bag, let it sit, remove, and enjoy. I can throw a bag of Earl Grey in my back pocket for consumption later in the day (which I've just done). Since tea bags usually have a string attached, it's very easy to control the steep time. For the producer, the bag is easily marketable as a simple way to drink tea, and it offers a way to utilize broken pieces of leaves like dust and fannings that are the by-product of loose leaf tea manufacture, thus reducing waste and making more tea available. Think "seconds" of apples or tomatoes at the farmer's market.


    Loose leaf?


    That's not to say there aren't loose leaf teas packaged in bags. My consideration for this lies in the effect this has on the tea, and how it's used by the consumer. On the whole, loose leaf teas are less dense than teas usually packed in bags. That means they will expand to a much greater size than will fine, broken pieces of tea leaf. As a result of the unbroken nature of the leaves, they will take up more space once steeping than will the tea generally packed in a tea bag. The more the leaves are allowed to unfurl and "give up" their flavor to the water in which they are steeped, the more flavorful will be your infusion. While this can be done with a large, reusable mesh bag, don't skimp on space - there's not much that's more depressing in the tea world than seeing a tea bag bulging with whole, unbroken leaves.

    Respect the leaf!


    So, tea bag or no, loose leaf teas have a lot to say and a ton of flavor to give up. Steeping them in the largest environment possible, unhindered by bag or walls will elicit the most flavor from the leaves. That is, to an extent - I wouldn't boil 10 gallons of water to make 10 gallons of kombucha, ever. Keep in mind also that loose-leaf teas should always be infused multiple times, with the longevity of flavor and color decided by the amount as well as the variety of tea.


    The multi-steep


    For a kombucha brewer this would take the form of adding boiling water to your tea and allowing it to steep for 20 minutes or so; then, pouring off that first infusion and adding more boiling water, and allowing another 20 minute steep. This can be done as many times as possible until it seems there is no more nutrient left in the tea, as can be told by the flavor or color. Be vigilant that you aren't creating more tea than your fermentation vessel will be able to hold.


    Respect and reciprocation


    This attention alludes to a respect for the earth in not wasting its products, but also in reverence for the producers of the tea. Plucking tea is no simple task, and often takes place in locations that require climbing and balancing, as well as a trained attention to detail. Where the biological makeup of kombucha is the result of the symbiotic pairing of bacteria and yeast, so intertwined also is the relationship of man with the tea plant in the cultivation and preparation of tea leaves for consumption. Since in this day and age it can be nearly impossible to give back directly to the producer, at least get as much out of the leaf as is possible, and send out some aloha for all of the labor that went into getting it to you. Your 'buch will be that much tastier because of the good intentions that were incorporated during the brewing process. (Such observance with your standard tea bag might be steeping it twice, or maybe three times, and giving it a hearty squeeze after the last steep).


    The big steep


    You can always just dump your loose tea into a pot of boiling water, stir it around, and worry about straining later. Really this is the ideal, as far as the leaves are concerned, but really it makes more work than is necessary. You can use a strainer, but a strainer that will pull out all particulate will likely be difficult to clean - especially if it's made of metal (I have spent a lot of time cleaning metal strainers in my 'buch brewing days). So, you may choose to use a mesh filter bag to achieve the same end. The same issue arises, though, in that you're going to have to clean the filter bag, that while small can provide a bit of a challenge, if only by being slightly time consuming.


    Steeping black tea, rooibos and clove in my French press Kombucha Brooklyn Steeping black tea, rooibos and clove in my French press


    That's why my favorite way to steep tea for smaller home brews involves a French press. It's very easy to clean, efficient at keeping the steeping water hot, and easy to quickly empty and refill. Also, it allows me to get the most out of my tea leaves. For a one gallon brew, I'll add 12 grams of a nice loose leaf tea, and fill the 34 oz. French press 1/3 of the way with boiling water. I'll let that sit for 20 minutes, pour off the hot liquid, add the same amount of boiling water, and allow another 20 minutes.


    Repeat one more time, and you've got 34 ounces of steeped tea ready and hot enough to dissolve your sweetener. This is a simple model for a triple steep, but you could easily draw it out over 10 steeps - you'll just want to make sure you aren't steeping too much tea so you've overfilled your brew jar. After stirring in the sweetener, add cool water to bring the temperature down, add your starter and SCOBY, and you're ready to let your 'buch fly. Always keep in mind your final volume - if you've steeped so much tea there isn't room for the starter and SCOBY, you'll have to pour some out - but keep that in mind for your next brew.

    Steeping loose leaf tea with my French press - Kombucha Brooklyn Steeping loose leaf tea with my French press

    So, if you're brewing a lot of 'buch, using tasty loose leaf teas and herbal blends, invest in a French press. Your 'buch will be tastier and more robust, and that can't be a bad thing!


    Happy brewing!

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