How to Brew Kombucha

Weird science project or tasty drink? It's both!
by Lynn Siprelle

What is THAT!" hollered Josie when I opened the box we'd just gotten in the mail. Floating in the plastic bag inside was a whitish disk with brownish threads hanging from it that looked more than a bit like a very flat jellyfish.

"That," I said, "is a kombucha...thingie," I finished lamely. How to explain to a child what a symbiotic collection of bacteria and yeast (aka "scoby") is? Because that's what we'd just gotten in the mail, a "thingie" commonly called a kombucha mushroom, even though it's not a mushroom at all.

"It looks like an alien!" yelled Jo. Maybe it is, added her father. One thing led to another, and we named our scoby Gonzales--Alien Gonzales, get it? Never mind. Suffice it to say that as quickly as we could, we put Gonzales to work in a gallon jar of strong sugared tea on the counter, where a Gonzales descendent has been happily brewing ever since for the last two years.

Why, you may be asking yourself, do you have an alien-like organism floating in a vat of sweet tea in your kitchen? Ah, so that it will turn the tea into kombucha, a drink with both amazing flavor and amazing powers for healing. Or at least so its adherents (and a couple of studies) say.

I'm one of its adherents. When I'm regularly drinking kombucha, my digestion is better, my skin improves and my blood sugar seems more stable. When I first started drinking it, my gray hair even started coming back dark, but that was a passing trend at best. All of this is completely subjective in my case; I have no clear proof that drinking kombucha did any of this definitively and of course Your Mileage May Vary. But I can tell you definitively that kombucha is delicious and cheap to make yourself. You can pay upwards of $3 for a small bottle of it at the health food store, or for the price of five plain old tea bags and a cup of sugar make a big batch of it yourself for pennies a bottle.

Making Kombucha
Gonzales. Ain't he handsome?The first step in brewing kombucha is to obtain a scoby; see Gonzales there to the left on a salad plate waiting to be put in a new jar of tea. I bought Gonzales mail order, but here's the thing about scobies: Every time you brew kombucha you get a new one. (That's not actually Gonzales; it's something like Gonzales XXIV.) It should be easy if you live in a larger area to find someone with a spare scoby to give away through Freecycle or Craigslist--heck, just email your friends and I bet you'll turn one up. If, however, you're out in the middle of scoby-less territory, I bought mine at Kombucha.org, which is also a good source of information. You can also try the International Kombucha Exchange, where you'll find people who will give scobies away. When you get your scoby, make sure the person gives you at least a cup of kombucha as well.

Once you have your scoby, you'll want to keep it in the fridge in the kombucha it came in until you're ready to use it. Store it in glass if at all possible; plastic can leach into the kombucha, and metal is reactive with its acids. I have a Corningware container I keep mine in.

To brew your kombucha you need:

  • 3 1/2 quarts of filtered water--the chlorine in tap water can hurt your scoby! Filter the water through a Brita or other water filter, let it sit out overnight to let the chlorine evaporate (happy thought, no?) or use bottled water. Doesn't have to be distilled, just non-chlorinated.
  • 1 cup regular old white sugar
  • 5 regular old black tea bags--you can get as fancy as you like with the tea, but I use garden variety restaurant supply tea bags. Red Rose, Lipton, whatever. AVOID ARTIFICIALLY FLAVORED TEAS like Earl Grey or Constant Comment. If you want to experiment with flavor, try different kinds of tea like green or white, or substitute a bag of herbal or spice tea for one of the black tea bags. I like putting in a bag of Yogi Tea. Just make sure the bulk of the tea is camellia sinensis--the plain old tea plant--in some form.
  • A large pot
  • A gallon-sized glass jar
  • A piece of cloth that will cover the top of the jar
  • A rubber band or something similar that is big enough to go over the mouth of the jar
  • Your scoby and at least 1/2 cup of leftover kombucha from your last batch

Be sure your hands and equipment are very clean. Bring the water to a boil in the large pot. Once it's come to a boil, turn off the heat, dump in the sugar and add the five tea bags. Set your timer for 15 minutes and take out the tea bags once it goes off. Put the lid on the pot and leave it to cool. I usually leave it overnight.

Once your tea is cool, pour it into the glass jar. Wash your hands well, take up your scoby gently and slide it into the tea. Add at least a half-cup of already-brewed kombucha. If you don't do this, the tea won't be acidic enough and it'll mold. Cover the top with the cloth and fasten the cloth with the rubber band. It's important to put the rubber band on to keep out fruit flies, and the kombucha needs air so don't be tempted to just put a regular lid on. Put the jar in a dark, warm place in your kitchen. I don't go out of my way; I have a hallway pantry where I do all my ferments and it's not especially warm but it is out of the sun. Cooler places mean a longer ferment time, that's all. Forget about your kombucha for at least a week.

After a week, check on your jar. You should see a new scoby forming at the top. If you see green mold, your tea wasn't acidic enough. Take out the scoby and start over. If the mold is just on the tea, not the scoby, you won't have to throw the culture out too, but if it's on the scoby, you're back to square one. This has only happened to me once in two years.

Your kombucha is through brewing when the new "baby" scoby is at least 1/8" thick. You will know in time how long to leave your kombucha on to brew; the longer you leave it, the more sour it gets, and you'll learn how long to leave it to get it just right for your taste. We like it half-sweet half-sour and fizzy.

Oh yes! The fizzy part. Or:

Storing Your Kombucha
Yes, kombucha is naturally carbonated! To keep the carbonation in, I use bottles called EZ Caps. Some imported beers come in bottles like this--Grolsch is one--so if you know any beer connoisseurs see if you can talk them into drinking a case for you and saving the bottles. Freecycle might also be a source for these bottles. (The green one in the picture at the top is a Grolsch bottle a friend gave me.) If not, you can buy them at most wine and beer brewing supply houses. They're not too expensive and you'd be amazed how handy they are; I don't know what I did without EZ Caps around.

In any event, whatever you decide to do, store your kombucha in glass. Metal is reactive and plastic can leach into the kombucha. If you don't want to use EZ Caps I'd suggest mason jars with plastic lids, but I can't say that it'd keep the fizz in very well. Keep it in the fridge. It stores pretty much indefinitely. Over a long time it may grow a tiny scoby at the top of the bottle, and it may get more sour, so keep that in mind. If it gets too sour, it makes a good vinegar substitute in salad dressings. (DO NOT use it in pickling/canning; it has too variable a pH.)

Drinking Kombucha
Some people find that they're sensitive to kombucha at first; it can give you stomach rumbles and be fairly, uh, cleansing to the bowels shall we say. It's suggested you drink no more than two ounces a day until you know how your body handles it. I have worked up to being able to drink a whole 16 oz. EZ Cap bottle at a go, mostly in the summertime because it's so dang refreshing, with no ill effects, though when I first drank it I did have a bit of a rumbly tummy--not bad, and not at all painful, but my internal flora were definitely adjusting. That's to the good; properly brewed kombucha is one of the best of the probiotics.

But mostly, kombucha tastes great! It's healthy, delicious and cheap. What more could you want from a science project?

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Anhata's picture

I've found I need to "warm" the kombucha during winter

Submitted by Anhata on Wed, 02/08/2006 - 8:15pm.

My kitchen is pretty cold in winter since it faces north and it takes forever for kombucha to ferment all by itself. I did some internet reading and found that there are several ways to keep the tea warm enough to encourage the scoby without being too warm. The method I use is a reptile tank warming pad (available in 'most any pet store) that would normally go underneath a terrarium. I put it on the kitchen counter, put a pot holder down and put the glass jar containing the tea and scoby on top of it. A towel would probably work just as well between the warmer and the jar, if not better. It still takes about eight to ten days, but without it, it'd be two weeks at least.

I used green tea in mine.

Anhata
www.familynaturally.com
Your Family's General Store, Naturally

KPConley's picture

My kitchen also faces north and I am in MD

Submitted by KPConley on Tue, 02/27/2007 - 6:39pm.

When I make my yogurt, I have to let it sit for at least 24 hrs for it to set up better or it is runny...in the winter anyway.

I am only 7 mos into switching my family over to NT, so still working out the kinks in the house and attitudes...LOL

I found a freezer on Freecycle, now I will have to work out the warm spot in the house.

I do have a question though...how warm would be too warm to make kombucha?

Kathy

Lynn's picture

too warm

Submitted by Lynn on Tue, 02/27/2007 - 10:02pm.

I'm in Oregon, and it's never been too warm here for kombucha, at least at my house. I couldn't say!

Lynn Siprelle, Editor

Anhata's picture

temp of the tea is the temp to watch

Submitted by Anhata on Thu, 03/01/2007 - 6:13pm.

The temp of the room will affect the kombucha, obviously, but it's the temperature of the tea that determines how well it ferments. I've seen numbers thrown around from the mid 60 degrees to high 80 degrees Farenheight. Somewhere within that range is best for the colony. Any higher than 100 degrees and the critters start to die. Hence why you cool the batch down before putting the scoby in.

If you really need to monitor the temp of the tea, you can get a flat temperature stick at a pet store for fish tanks and adhere it to your fermenting jar.

I ended up putting a baker's cooling rack over the terrarium heating pad and putting the glass jars on that. Having some air between made the tea warm but not overly so, a cosy fermenting corner in my otherwise chilly kitchen.

That being said, I have to disclose, I haven't brewed any kombucha this winter. I kept letting it ferment too long and it was too sour to drink. I'm trying to psych myself up to trying it again and pulling it after 6 to 8 days.

Anhata
www.familynaturally.com
Your Family's General Store, Naturally

KPConley's picture

WOW! I actually feel like I can make this now ;-)

Submitted by KPConley on Tue, 02/27/2007 - 6:34pm.

Lynn,

Thank you so much...this article is great! Do you try to follow NT also?

I have been wanting to make my own Kombucha for a while now...my daughter is hooked on it and loves when I buy it at my organic market, but it is just way too expensive that way.

Hey with a little luck, she will be making it before long Eye-wink

Kathy

Lynn's picture

as best I can

Submitted by Lynn on Tue, 02/27/2007 - 10:01pm.

NT (Nourishing Traditions) made a huge difference in our family's health; until my big event last spring I was doing well, and I'd have kept on doing well if they hadn't given me a drug I'm sensitive to.

I'm glad you found the article useful. Smiling

Lynn Siprelle, Editor

Bernie's picture

I know you can bottle

Submitted by Bernie (not verified) on Sun, 01/13/2008 - 9:40am.

I know you can bottle kombucha in EZ-cap bottles, but has anyone tried to bottle it like a beer with the caps and beer bottles?? I would be interested in any info on this. Thanks

Guest's picture

I've bottled mine in beer

Submitted by Guest (not verified) on Fri, 01/18/2008 - 12:19pm.

I've bottled mine in beer bottles quite successfully. I am still experimenting on the perfect timing of it all. Right now I fill the bottles to about 1/2 inch from the top, cap them, and then leave out of the fridge for several days. This allows more carbonation to occur for that sparkling goodness. After I feel it's been long enough, I'll transfer to the fridge until they get drunk down. Experiment for yourself what works best in your climate!

This works great but I'd really prefer to use the ez-bottles because I wouldn't have to buy caps or a bottle topper.

Guest's picture

i bottle it like beer, after

Submitted by Guest (not verified) on Thu, 01/24/2008 - 10:17am.

i bottle it like beer, after it is done fermenting, i strain it and funnel it into empty beer bottles. I let it sit for a week or so until there is pressure and it is very fizzy, like soda or beer. but it does produce a mini scooby so i am looking for ways to stop that so only the c02 producing yeast is active.

Guest's picture

if you fill it to the top

Submitted by Guest (not verified) on Thu, 02/21/2008 - 7:39pm.

if you fill it to the top and there is no oxygen the bacteria should stop producing

amy tran's picture

question?

Submitted by amy tran (not verified) on Mon, 06/23/2008 - 11:23am.

wow - i love how detailed your instructions are - can't wait to get started!! one question though - where do you recommend i find a 1 gallon glass jar w/ a WIDE mouth (i assume it has to be pretty wide so you can gently put the scoby in there)?? thanks so much!

Lynn's picture

I just use regular ones

Submitted by Lynn on Wed, 06/25/2008 - 7:07pm.

The scoby doesn't seem to mind being bent and wiggled a little, just don't bother it too much. Good luck!

Lynn Siprelle, Editor

lisarose's picture

large glass containers

Submitted by lisarose (not verified) on Mon, 08/11/2008 - 1:52pm.

hello!
you can find the 1 gallon large jars on e-bay. i spotted several for approx. $11. + shipping.

also i just drove down to santa barbara and set my son up with two 2 1/2 gallon Ceramic Water Crock Dispensers $18.95 + shippping. that can be found at foryourwater.com. ((what better health policy can you provide ??!!!) it is truly amazing the health benefits of this ancient tea brewing method!!

this container has a spigot and allows the continuous kombucha brewing method.

either way it is fun to brew.
i am on my 7th continuous batch and although i do not feel i have gotten it "RIGHT" as the tasty commercial brews,
we have been very happy with our results.
which vary...........but i consider this a self taught class so i am kind to myself.
but yes after completed and placing in airtight bottles (i use my cases of commercially made brew) and setting aside for 3-5 days the carbonation matches that of the commercially brewed kombucha teas!!!
be well and brew well! lisa rose
p.s. i have always used white vinegar as a disinfectant in my pots and brewing containers!
and ZERO molds have appeared!
and regarding fruitflies DO NOT USE cheese cloth EVEN if in many layers!! fruitflies can drop their eggs thru!! been there done that!!

Guest's picture

Flavored Kombucha

Submitted by Guest (not verified) on Mon, 08/11/2008 - 9:36am.

I'm just learning to brew my own Kombucha after buying the bottled product for years. I would like to be able to make flavored Kombucha in addition to drinking it as is. I would love to add spirolina or freshly pressed juices. Any recommendations? What step in the brewing process can I do this?

Thanks!

Lynn's picture

I would do it at the end

Submitted by Lynn on Mon, 08/18/2008 - 11:11am.

A friend of mine (Hi, Ima!) puts slices of ginger in during the brewing process for a very spicy kombucha, but if you want to add spirulina or juice, I'd do it just before you drink it.

Lynn Siprelle, Editor

Jerod's picture

Where to buy a kombucha mushroom / scoby

Submitted by Jerod (not verified) on Tue, 08/26/2008 - 5:53pm.

www.nicksnaturalnook.com is an ebay store that sells kombucha cultures and kits and kefir, yogurts, you name it. Pretty nifty store they got there. And it's all organic too which is important to me. Cheers.

Peter the Brewer's picture

Brewing Tips

Submitted by Peter the Brewer (not verified) on Tue, 09/23/2008 - 3:53pm.

I've been brewing at home for about 6 months now and after reading others posts thought I'd share some of experiences. First of all after brewing a gallon at a time I got tired of doing batch after batch and bought a 2.8 gl dispenser at target.com. (http://www.target.com/Siberia-Dispenser-2-8-gal/dp/B000GTFMNA/ref=sc_ri_...) This has been fantastic as I can brew 5-6 liters at a time. I also purchase 1 liter ez top bottles from Ikea for $2 a piece which for me are perfect for both consumption and sharing with friends. I couldn't find them online but my local Ikea has them readily available as I've gone back 3 or 4 times now to get more. I prefer a very carbonated Kombucha so I fill my bottles to the very top and store them for about 3 to 4 weeks at room temp. I'm experimenting now with the same storage time refrigerated to see if there's any noticeable difference. Well that's it for now. Please ask more if you want and please share your experiences, recipes and thoughts. I'd appreciate it.

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