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Making Coffee Kombucha - Not Wrong, Just Not Right


Long speculated upon and feared even in anecdotes, a week ago I had the perfect opportunity to embark upon the storied nostrum that is... komffee? Coffbucha? Joebucha? Coffee kombucha. Perfect...


Coffee kombucha Making coffee kombucha; after 6 days of primary fermentation

While open-minded, I didn't think there was any way this could be tasty. Enough people had asked about it, rumors circulated, and it came to the point that this brew couldn't be avoided; of this fact the new office-tap acquisition of Stumptown cold-brewed coffee was the ultimate indicator.


So, I opened up the tap, poured 32 ounces of the polarizing blackness, and added 1/4 cup of sugar to the joe after warming it on the stove. I added a bit of SCOBY, some distilled white vinegar as a starter (1 tbsp), cringed, covered and dated the jar, and set it out to ferment.


After 6 days in primary fermentation, there was a pretty gnarly SCOBY growing:


SCOBY of Coffee SCOBY of coffee

Having a pretty adventurous palate still does not issue into passive consumption. The creation of what essentially is sour coffee made me reticent to attempt making this beast, though I'd thought about it many times before.


Well, I wasn't proven wrong. Sour, acidic, vinegary coffee was the result - I considered the brew complete when I saw the SCOBY and smelled it - pretty awful, on both fronts. I let a couple of people in the office try it before me, still highly skeptical and protective of my taste buds' fortitude.


KBBK employees investigating the coffee 'buch KBBK employees investigating the coffee 'buch


The result of our tasting left us sure that the experiment had worked - coffee kombucha was assuredly the result - but in no way could this be construed by any of us as being something drinkable. Even the small cup we poured and passed around went unfinished.


I bottled it, so as to preserve the train wreck that would in the future be sure to elicit fascination and disgust among unsuspecting subjects - a little carbonation should attract a completely new level of repulsion. Kind of like the time I made apricot-peppermint kombucha.


*We did discover the SCOBY created from this brew was much more palatable than the brew itself.




This experiment behind me, I look forward to better and brighter days. I will try not to forget what happened, only the taste. Be skeptical. It's not wrong, just not right.


SCOBY can't live on beans alone SCOBY can't live on beans alone


19 thoughts on “Making Coffee Kombucha - Not Wrong, Just Not Right”

  • Marina Prada

    hi guys ,cofffeeee kambucha great idea, but wrong aproach; ..don’t give up…i can help. my name is marina,i am a certified raw, life food chef, i studied with david jubbs for over 5 years ,here in ny. i am from colombia, my father was a coffee grower, i know the best away to make the best kambucha coffee ever….. i also know sarna and matheo since 2002′ . last year i tryed your kambucha at pure food, and i like it a lot.call me please at 301 300 9491. ps i just move back to ny…it is great to find all this grat ideas for the good of all’. sincerely, life food chef, marina prada.

  • Kombucha on Tap, LLC

    A lot of our clients have cold-brewed coffee on tap and kombucha on tap. Have you guys experiemented with half kombucha and half cold brew coffee or a splash of one in the either? We're thinking that might be the best way to make a komfee.

  • William Donnelly

    MMm have you tried it? what did you think?


  • Brian Clarke

    While this may never be right there were certainly some serious errors with your attempt. Why would you add vinegar? Coffee starts out acidic enough to meet the needs of a kombucha scoby. Vinegar added to this already acidic coffee and the additional fermentation were sure to create an undrinkable product. I have yet to try this process myself but in researching those who have claimed to make an appealing coffee-bucha I have found none add vinegar. Maybe you could try again and let us know!

  • Sherry

    When I make coffee Kombucha everybody loves it and I’m pretty sure you would enjoy mine as well.

  • carmen

    There's no need to add vinegar, just add a few dashes of some of the usual kombucha (made with tea). Then it will taste better

  • Water

    My main question is what type of coffee did you use? A lighter roast or a darker roast. When I brewed it I did a half gallon of a KickAss dark roast made really strong (well, how I usually drink it), but I also made it hot and let it cool instead of doing a cold brew. And I agree with the fact that coffee is acidic enough to create a habitable environment for a SCOBY to live and thrive; there are definitely enough nutrients.

    When I did it I bottled it a bit too late. I bottled mine at 7 days but I should've at 5 for at 5 I had this deep aromatic chocolate flavor that diminished in the two extra days. But this is more than palatable and I enjoy it since it hasn't lost its caffeine content it makes a great afternoon drink without the hassle of brewing a full pot of coffee or making a single espresso.

  • Jahdai

    I have made Coffe Kombucha many times. I started with a single origin Ethiopian Coffee via pour over. 23-24 grams per 305ml water. I made a total of what would be 5 cups and placed scoby into this. Turned out fantastic. This is really good over ice and with a little cream. KB, really, you should try harder before giving up/bashing this experiment. You don't have to like it, but in the spirit of experimentation, sheesh don't cal it quits after one failed attempt.

  • Craig

    Did you try it after a bit of carbonation? Was it any better (doubtful but figured I'd ask haha)?
    I might try to make some Kombucha coffee, like one of the other commenters said, I've also read that it doesn't need any vinegar or starter tea, I can see that making the coffee very...unpalatable to say the least. After your experiment, I have very low expectations as to how this will turn out for me, but I figure I'll try to make it anyways.

    • Chris

      Hey Craig! I did taste it post-carbonation. It was kind of worse - like sparkling vinegar coffee. I'm going to replicate this experiment and not use a starter, and post the results ;-). The SCOBY tasted pretty good, oddly enough. Give it a go!

  • Robert Palmer

    Recently, I helped with the choice of beans and roast for a coffee kombucha -- and it was sublime. Mild, sweet with hints of chocolate and citrus spikes. Where you went wrong: 1. Been choice 2. roast choice 3. choice of heating the cold brewed coffee. Would you make kombucha out of dried-up low-grade orange pekoe and expect it to taste like premium Dragon well? If you are going to make kombucha coffee you are going to need special beans specially roasted for that purpose.

  • Amanda

    I am 4 days into my kombucha coffee brew, and nothing seems to be happening. I really want to make this work, so if anyone has had a good result, could you please share what kind of coffee you used, and what roast? Even what brand would be extremely helpful.
    Thank you!

  • Drew Smith

    I usually make my booch as I normally would. Then when I bottle I drop in a single bean which I breifly set on fire using my stove and tongs. I also add a very small piece of a vanilla bean. This tastes really good.

  • Lorraine

    I am wanting to make coffee kombucha. Does anyone know if the end result is acidic?

  • Carol

    I am about to embark in the Koffbucha tonight! I have read in other blogs that you really have to keep a close watch over it and test it everyday after the 5th day. When you get a desired flavor you are supposed to refrigerate immediately as coffee has oil in it which can make it go rancid. Wish me luck!

  • Johnwayne

    Today is day 5 of my first coffee kombucha-- made from mature scoby from tea version. Funky looking scoby, but the brew tastes great---- in the frig now to cool off, and I will bottle half of it now and add more coffee to make a continuous process, just like for tea. The tea version brews constantly in my 2 gallon jug sitting by the fireplace--- at about 80 degrees--- that kombucha is absolutely perfect---- I draw off several bottles each week, add juice concentrate and let it go few more days for carbonation. Prune juice works good--- has lots of complex sugars......Ciao

  • Oiac

    Man, that's crazy stuff. I'd like to try. I'll buy some premium coffee, make in a perfect way, and split into two experiments: cold brewed and hot brewed coffees in diffent ratios of kombucha starters.

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