How To Brew Your Own Homemade Kombucha

May 19th, 2009 - filed under: The Food » Recipes

 

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Kombucha, that magical mysterious elixir, is actually quite easy to produce with a bit of kitchen chemistry. I wrote about Kombucha a few weeks back, after I’d finished my first batch. And as promised in that article, here’s your step-by-step guide to home brewing.

 

What You’ll Need:

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  • A living SCOBY + some starter tea
  • A large *glass* jar (no metal, no ceramic, no plastic, etc) with a wide opening (a standard 1-gallon jar, as shown at right, is best)
  • Sugar
  • Caffeinated tea
  • A very clean cloth + a rubber band
  • A steel pot and a big metal stir spoon

 

 

Prep Work

  • Most likely, the hardest part will be getting your hands on a SCOBY. You’ll just have to be creative and snoop around your city for a source. I suggest starting with Craigslist or googling ‘[your city] kombucha’. You can also try poking around your local co-op or health food store – and check the bulletin board.
  • Once you’ve secured a SCOBY (and it’s alive, floating in some starter tea), you’re on your way. Make sure your workspace is clean and at least semi-sterile. Gather and clean your tools (see above).
  • This is a long process, so set your schedule accordingly. Brewing is a good Sunday project; you can have it going while you’re gardening or cleaning or laying around naked with your sweetheart.

 

How To Brew

1)  In a large, stainless steel (non-teflon or other weird material) stock pot, boil 1 gallon of water. Keep it at a full boil for at least 10 minutes.

2)  Remove the pot from heat and add 1 1/4 cups sugar, stirring with a metal (non-plastic, non-wood) spoon. I use organic evaporated cane juice instead of white sugar. DO NOT substitute agave, honey, Splenda™, or any other sweetener. 

3)  Add the tea. Any kind, as long as it’s caffeinated. This will determine the final flavor, so if you use a cranberry green tea, you’ll get a cranberry-ish flavored kombucha. I usually use organic plain green or black tea bags. You can use bagged or loose tea, but if you use looseleaf make sure it’s in a fine-meshed infuser. You don’t want any tea leaves floating about! 

 

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4)  Steep the tea for about 4 hours, allowing the water to cool and the tea to get nice and strong. Go ahead and garden or clean or or lay around naked. When the tea is good and strong (many hours later), take out the tea bags/infuser.  

 

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5)  Double check that your widemouth glass jar is very clean, and then pour in the gallon of sweetened tea. A funnel can really help with this.

 

DON’T USE ANY METAL BEYOND THIS POINT

Metal reacts poorly with the kombucha culture. It’s not a good thing.

 

6)  Wash your hands thoroughly before handling the SCOBY.

7)  Open your SCOBY + starter  container, and pour the starter into the widemouth jar. There may be gooey strings or giblets – that’s just SCOBY stuff, and it’s fine.

8)  Fish out your SCOBY. Admire it’s alien oddity. Blow it a kiss. Give it a name (mine is Scoby-Doo). Notice that there’s a ‘smooth side’ that is lighter, and the other side is darker. The slimy dark stuff is yeast. You’ll also notice that familiar, uniquely komucha-esque odor!

9)  Now carefully slide your SCOBY into the widemouth jar, smooth-side up.  It may sink, which is okay, but it will probably float.  

 

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10)  Place the clean cloth over the top of the jar, pulling it taught and securing with a rubber band. Now you just need to tuck that sucker away for 2-3 weeks. It prefers a warm dark spot, like in a cupboard or closet. It does not like drafts or sunlight, so don’t brew your kombucha on a window sill!

11)  Adjust the brew time for your taste preference. The warmer it is, the faster it will brew. The more caffeinated it is, the faster it will brew. The longer you let it brew, the stronger and less sweet it will be. I like less sugar, so I ferment for at least 3 weeks. It’s not recommended that you brew a batch longer than a month.

 

— weeks later —

 

12)  First, you’ll need to remove the SCOBY. Every time you brew, the ‘mother’ (the original SCOBY)  grows a ‘baby’ (a new SCOBY). These names are misleading because the two are identical in every way, indistinguishable from one another. They’ll be stacked together, like two pancakes. You can either leave them be and keep on going with a double-thick SCOBY, or you can carefully separate them. If you do take them apart, each one can brew its own batch. Then you can stagger your batches for constant kombucha flow! Remember: each time you brew, the mother makes a baby.

13)  You’ll need a jar to hold your SCOBY while you’re not brewing.  Make sure the jar has a plastic (non-metal) lid.  With very clean hands, fish your SCOBY out of the widemouth jar and fold it into the storage jar. Then add enough of the new brew to completely cover it.  This is your starter tea for next time.  Store the SCOBY + starter tea in the refrigerator, indefinitely.

14)  Portion out your brewed kombucha into smaller storage containers.  I save glass bottles with plastic lids just for this purpose.  Store the tea in the fridge for up to 6 weeks.

15)  Drink!  Experiment!  Enjoy!

 

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Notes on Safety

  • Wash your hands, wash your hands, wash your hands.
  • Sometimes a culture will become contaminated.  It happens!  If your SCOBY shows anything resembling mold, TOSS IT!  If your brewed kombucha comes out smelling funny, TOSS IT!  If your kombucha ends up tasting funny, TOSS IT!  Remember, there’s only a porous rag separating your fermenting sugar water from any and all airborne bugs.  Contamination can happen, so be wise and play it ‘better safe than sorry’, okay?
  • If you want to add fruit juice to your kombucha, do it after you’ve brewed.  DO NOT add fruit juice before fermentation.
  • Don’t use bleach on any of your kombucha-making equipment. Vinegar is a great cleanser. The dishwasher (with a mild detergent) is also okay.
  • Listen to your body!  Start by drinking a little at a time.  Home brew is A LOT stronger than the store bought stuff, and the B-vitamins can get you quite heady. So take it slow and listen to your body!

 

Close-up during brewing - you can see it bubbling.

Close-up during the brewing process - you can see it bubbling away!

 

***DISCLAIMER – My dears, I cannot be held responsible for what you do with this information.  So please, use your big beautiful brains, and be thoughtful and be careful.***

 

I know there’s been a ton of interest out there, so I can’t wait to hear how this works for you guys. Make sure to report back! And LUCK!

sign-off

  • http://sandandsilk.wordpress.com Amy

    I really want to try making this on my own, but it’s a little scary! It’s like canning, making yogurt, and sourdough all at the same time LOL

    Thanks for the detailed instructions!

  • http://bonzaiaphrodite.com Sayward

    @ Amy – Haha, yes that’s exactly what it’s like! Don’t be scared by all the warnings, as long as you take the proper precautions (just like canning), you’ll be totally fine. There’s only been a few reported cases of actual illness/death by kombucha, and all were careless and easily avoidable mistakes.

    In other words, you should do it! =D

  • Matt

    Sayward, you rock! Came across your site off of Lifehacker and I’ve been reading post after post. I love your take on things and the info is just what I’ve been looking for. Sounds like you are in Portland, any advice on where to go to get a SCOBY or some cheap veggies like your $1 bags in PDX?

  • http://bonzaiaphrodite.com Sayward

    @ Matt – Thanks man! Welcome to the site!

    I got my SCOBY from an awesome couple who run a small operation called Lion Heart Kombucha. They sell starter kits and all the accouterments – you can email them at LionHeartKombucha@gmail.com

    As for cheap veggies, check out Limbos on SE 39th, or People’s Co Op, or really any of the neighborhood Co Ops (I hear there’s a great one on Alberta). Luck!

  • Pingback: David Wolfe’s Views On Kombucha

  • gypsyrose

    After attempting my first batch, I think I did something wrong. I realize I could’ve waited longer than 7 days, as my batch was less carbonated/vinegary. My scoby seems fine, but didn’t produce a baby (although there were some spots of transparency on her).
    I have a few questions:
    #1. Does white tea take twice as long as green/black?
    #2. Is it still okay to consume a batch where no baby scoby was produced?
    #3. If the white tea I used had a hint of pomegranate, will the pomegranate have the same negative effect on the scoby as say, earl grey?
    #4. How does one know (other than mold) that a scoby is unhealthy or dead?

  • http://bonzaiaphrodite.com Sayward

    @ gypsyrose – That’s a bummer your first batch didn’t quite take off. But I can definitely see some reasons why it may have stalled. To answer your questions,

    1. White tea is almost decaffeinated. It technically has caffeine, but it’s so little it’s practically negligible. I don’t think it’s the best candidate for kombucha, because the culture really does require caffeine in order to thrive. This would be my first guess as to why your batch didn’t work out. I’d definitely go with green or black next time.

    2. If the batch still fermented, I’d say it’s okay. That means it smells like kombucha (a very distinct odor), it bubbled, etc. From what you’ve said here, I don’t think your batch actually brewed, in which case you’d just be drinking tea that sat out for 7+ days. I wouldn’t risk that, personally.

    3. I’m not sure what you mean by ‘negative affect’. It will change the final flavor, but I don’t think it’s bad. My kombucha teacher makes an amazing brew using blueberry green tea – it’s delicious. I’ve used earl grey in my batches and I like it. It won’t ‘hurt’ anything using a flavored tea, it will just change the final taste. Flavored tea is fine, but other juice or added flavors is what causes a problem.

    4. I go by looks and smell and feel. If there’s no mold I’d say it’s most likely healthy. The scoby should always have that ‘kombucha odor’ – if it smells rancid, or if it’s odorless, I’d say it’s a goner. It should also feel firm to the touch. It should not fall apart easily.

    It sounds like your batch didn’t go because of the caffeine and the time. I’d say try again, using a green or black tea and letting it go for at least 10 days.

    Good Luck!!! Let me know how it works out!

  • http://www.bitemenewengland.blogspot.com Janis

    I have been brewing my Kombucha for 5 days now. There is no baby on the starter. Is this a problem? If I try to start over can I use the same starter?

  • http://bonzaiaphrodite.com Sayward

    @ Janis – 5 days is really short. I’d wait at least 10 days – 2 weeks before checking. Remember that each time you check on it, you risk introducing mold and other pests. I am a firm believer of sticking it in the back of the cupboard and forgetting about it for a few weeks.

    As long as the starter is clean and healthy, you should always be able to re-use it.

  • WillofZion

    thank You
    Blessed Love

  • http://bonzaiaphrodite.com Sayward

    @ WillofZion – You’re welcome!

  • diablovt1125

    Has anyone considered using Tyvek as a barrier between the open mouth of the jar and the tea? I have experience growing mushrooms, which are considerably more prone to contamination, and I used to use Tyvek as a barrier that would still allow airflow when growing substrate. It keeps the even the smallest mold spores out but still allows for air flow. Just a thought…

  • diablovt1125

    PS. You can get free Tyvek envelopes from your local post office or off of the USPS website.

  • http://bonzaiaphrodite.com Sayward

    @ diablovt1125 – I’ve never even heard of Tyvek, but now my interest is totally piqued. I’ll have to look into those – they sound perfect! Thanks for the heads up. =)

  • Joshua

    I accidentally used all my starter when I brewed my first batch of Kombucha. Can I take some of the just brewed Kombucha and use it to sustain the SCOBY?

  • http://bonzaiaphrodite.com Sayward

    @ Joshua – Yep, that’s exactly how I do it. I use a little of the new brew to store the SCOBY, and start the next batch, each time. You should always be pouring your starter into the batch you’re brewing, when you add the SCOBY.

  • Joshua

    Thanks. Also, can I store my made kombucha in a stainless steel container? What happens if I do store it in stainless steel?

  • caryn

    Do you use the same 1 1/4 cup cane juice or is the amount different? Also, a lot of don’ts what happens if you do it wrong and comsume?
    (didn’t know it was so serious)

  • http://bonzaiaphrodite.com Sayward

    @ Joshua – I think the steel can react poorly with the brew. I wouldn’t store it in steel, but you’re welcome to try it. Let me know how it works!

    @ caryn – Yes, I use the same ratio of cane juice (evaporated cane juice is just regular sugar, but unrefined).

    The ‘don’t’ list is to prevent contamination. Since you are working with microbes and leaving your brew out to ferment, exposed to air, there is always the chance of bacterial or fungal contamination. You wouldn’t want to drink a compromised brew, so you need to be very careful. Kombucha making is perfectly safe if you follow the directions – I don’t mean to scare people. But it’s not entirely without risk and I always play it ‘better safe than sorry’, you know?

  • Leslie

    Great site young lady!! Good for you putting out all your positive vibes!!!
    Love it!! One ( of about a thousand) questions I have about brewing my own Kombucha. Do you have to worry about bugs, moths, flys, getting in the tea while it is steeping or do you cover it. Also I have read that the Kom might explode in the glass jars after it is done brewing, any precautions to prevent this!!!!!

  • http://bonzaiaphrodite.com Sayward

    @ Leslie – Aw thanks, and yay for putting the positivity out there!

    I don’t worry about bugs etc, but I guess technically that would be a concern. You can totally cover the tea while it steeps, if that makes you more comfortable.

    As for explosions, I’ve never heard of that. Perhaps because of the carbonation? But I don’t imagine that it would be any more likely than in any other carbonated beverage. Just don’t let it get crazy hot, and I’ sure it will be just fine. =)

  • Leslie

    Many mahalos!!! I will let you know how I do. The only reason I asked about the bugs is because I am a virgo!!! I love and respect all creatures on this planet and try to harm not a one……..

  • http://bonzaiaphrodite.com Sayward

    @ Leslie – I understand completely! Let me know how it goes. =)

  • Marisa

    I am so loving your blog, I read all of your posts in 2 sloooow nights at work. I tried making kombucha once but it went slightly science project on me and had to be carefully discarded!! On the exploding kombucha I read that the longer you store it at room temp after putting it in individual bottles the fizzier it will be. If it goes straight into the fridge it will be more flat, hope that helps!!

  • http://bonzaiaphrodite.com Sayward

    @ Marisa – Iiiinteresting, maybe I’ll try playing around with that. Glad you like the blog! Welcome! =D

  • purple.earthgirl

    I’ve been brewing Kombucha at home for the past three months, and for the first time I’ve got a batch that I’m worried about ~ it smells like sulphur! Do you know why that could happen, or if it would be bad to drink it? It still tastes the same, but the odor is really weird…. Thanks!!

  • Scrapophillia

    As I understand it, what I like to refer to as “the jellyfish pancake” isn’t actually the scoby. It does carry some of the scoby from being submerged in the liquid, but it’s just a cellulose by-product. I have used the fermented tea itself as a starter for friends and it works just fine! :)

    I’ve also made kombucha in a less than sterile environment (on a homestead), and it’s very forgiving as long as it’s well established. I was even told by Sandor Katz, the author of Wild Fermentation, that he just scrapes mold off the top and keeps going because if you re-feed the kombucha, the good scoby will defeat any other bad bacteria. It sounds ookie, but since he has aids, it seems he’d be in a lot more danger than the rest of us if it was a problem and he’s been using/growing kombucha for at least ten years.

    *shrugs* I’m not an expert, just throwing in my two cents.

  • http://bonzaiaphrodite.com Sayward

    @ purple.earthgirl – Sulphur huh? Personally I would toss it, but that’s just my paranoid self (see post below yours for example) I figure better safe than sorry, it’s cheap and easy to just make more and it’s certainly not worth getting truly ill over!

    @ Scrapophilia – I definitely realize that I take the super cautious approach, and that Katz is much more lenient (though I’d only heard that for the veggie ferments, not the kombucha) I guess it’s just not worth it to me, and since I’m putting it out there on the internet I feel obligated to be as cautionary as possible. I don’t want anyone getting sick! I’m sure you understand. =)

  • Scrapophillia

    @Sayward: That’s probably the best way to go. I didn’t mean to say that being cautious isn’t a good idea, just that fermenting is very forgiving as long as you use common sense. That’s what I get for commenting while I’m still asleep :P

  • http://bonzaiaphrodite.com Sayward

    @ Scrapophilia – Oh no worries! I wasn’t offended or anything. I tend to agree with you, I was just explaining why I take the safe route in my instructions. I’d trust Katz over me any day =D He’s a fermenting master!

  • sj smith

    ok so i can’t find a glass jar with a plastic lid TO SAVE MY LIFE! where’d you get yours? i’ve been to grocery stores, art supplies, nothing!

    can you over-brew? because of the jar search i’ve had mine going (smelling and looking fine) for almost 3 or 4 weeks..

  • http://bonzaiaphrodite.com Sayward

    @ sj smith – I got mine from a local kombucha brewer here in Portland, but I know they’re available online. That doesn’t help you at the moment but it might make sense to get one ordered as soon as possible. In the meantime you can use a metal lid. Try to keep the fluid volume low so it doesn’t touch the metal, but it won’t be the end of the world.

    You *can* overbrew, so I’d go ahead and pull this batch. You generally shouldn’t go more than 4 weeks or so max.

    I’m sorry you’re having some snags, but so cool that you’re brewing and it worked! Good luck with everything!

  • Heidi

    Your scoby looks so much bigger than mine! This is also weird: my mother produced a new baby on top of the liquid! Does that normally happen? I thought the mother reproduced one right beneath itself that you just peeled off?

  • http://bonzaiaphrodite.com Sayward

    @ Heidi – Mine did that too! But only with the one I made myself from storebought kombucha. Where did you get your SCOBY? Is it ‘homemade’?

    My SCOBY is probably bigger because I was using a wider mouthed jar. It usually molds to the shape of the container. =)

  • Amanda

    First, love your blog! Have been working on the kombucha and made the scoby from the storebought kombucha. My final scoby is HUGE…like 4 inches thick. Is that normal? Honestly, this may have sat longer than 4 weeks. Smells normal and no mold…any ideas?

  • http://bonzaiaphrodite.com Sayward

    @ Amanda – Hmm, if it looks and smells alright I’d think it’s probably fine, but of course I’m not there so I don’t know! But as for size, it probably just sat for extra long and grew bog and strong. =) Was it particularly warm? Heat definitely speeds up the process.

  • Joshua

    Hello Sayward.
    I have been brewing my own Kombucha now for about half a year. I’t s been great! ^_^ except for one thing.
    I now have four Humongous Mothers and I don’t know what to do with them. I don’t want to throw them away and I don’t know anyone else who brews. Any suggestions?

  • http://bonzaiaphrodite.com Sayward

    @ Joshua – Share the love! Put them up on Craigslist!

  • Leslie

    Been brewing my own Buch for about 2 months now. Love the homemade brew but seems to be losing some punch. The scobys have gotten really big and I keep brewing the moms with the babies. I am thinking maybe too many scobys in one jar…. would it be a good idea to start a new batch with only the young fresh scobys???

  • http://bonzaiaphrodite.com Sayward

    @ Leslie – Yes! That’s what I do. I separate the mother and baby after each brew and then start a new batch with only one of them. This way you can get multiple batches going at once (staggered, so you’ll never run out!), and you can also give away the extras and get all your friends brewing to! =)

  • sarah

    hello, i’ve been offered some wonderful looking kombucha and scooby, but i found out that my friend had used a metal spoon at some point past the tea brewing process. how big of a deal is this? i can’t find a clear explanation of how bad the results could be…thanks so much for your wonderful site~!

  • http://bonzaiaphrodite.com Sayward

    @ sarah – As long as the SCOBY looks healthy, I wouldn’t even think twice about it. =)

    Seriously, the ‘no metal’ thing is just me being the most paranoid of paranoid. I wouldn’t worry. Luck!

  • Nina

    Not sure of how many tea bags u r using Thank u God Bless

  • http://bonzaiaphrodite.com Sayward

    @ Nina – I recommend using 4-6 teabags. Luck!

  • Nina

    Why is the store brought stuff that can not be bought any more,…not as dark as to my experience with “home brews”?

  • http://bonzaiaphrodite.com Sayward

    @ Nina – A lot depends on the tea that you use. When I home brew with green tea, my kombucha comes out very light as well!

  • Tanya

    Just started brewing my first batch 4 days ago. I didn’t have a scoby to start with but read that you can grow your own from scratch using the same recipe.. tea, sugar, kombucha starter. I started two different batches and one is already growing. :) yay! Anyways…about finding a glass bottle with a plastic lid~ I read elsewhere that old wine bottles with corks work great. That’s what I plan to do, will let you know if I have any problems with it :)

    PS: Thanks for all the help!!

  • http://livecompletely.blogspot.com/ kory

    I’m both incredibly intrigued and terrified by this, lol. I keep reading about Kombucha but as usual you have the most in-depth info! Now what to do with that info… guess I’ll start with the store bought stuff and see if I can even stomach it first!

    Oh, do you know if it’s considered safe for pregnant women?

  • http://bonzaiaphrodite.com Sayward

    @ kory – It is not advised that pregnant women begin drinking kombucha, for 2 reasons. First because of the risk of contaminants (same reason you’re not supposed to eat deli meats or sushi, etc), which I don’t think is really too much to worry about, but the risk does exist. The second reason is because kombucha is a very powerful detoxifier, and you don’t want to detox while pregnant! If you’ve been drinking it regularly since before you became pregnant, then you should be fine. But they say not to start while pregnant.

    Hope that helps!

  • http://www.sarathomas.etsy.com sara thomas

    this sounds awesome! but i have never had (nor seen or smelled) kombucha. so how would i be able to tell if i did something wrong? i am not sure i’d know if it smelled funny or not…….

    i am so into health/nutrition and am a die hard do-it-yourselfer! i would love to attempt this. i am pretty sure that i would have a lot of trouble finding a mother locally, though. most people around here don’t even know what hummus is =( can you order online the same way you can for kefir grains?