Making Kombucha

 by arwen
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Kombucha seems to be the new "it" drink (although I live in the Bay Area, so this info may be biased). Of doubtful origin, this fermented tea has a passionate following who claim all manner of health benefits for it. I just like it because it tastes good.
 
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Step 1: Obtain Kombucha starter

You can buy the yeasty starter on the web (sometimes misidentified as a mushroom), or get it from a friend. You might also try looking on message boards of health food stores.

The starter replicates itself in each batch, so one is enough for your lifetime. Soon you'll have enough for everyone you know!
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amy2730 says: Jun 30, 2008. 1:14 PM
has anyone signed up for the 7 day mini course at GetKombucha.com? I want to start brewing this stuff but want to make sure I don't mess it up first...

thanks

amy
nlbknitter in reply to amy2730Jul 1, 2008. 3:53 PM
I did. It's not that instructive. I have seen plenty of other sites that achieve the same results. At the end you get a sales pitch on his equipment. It's still kind of low-key.
amy2730 in reply to amy2730Jun 30, 2008. 1:14 PM
what's that?
amy2730 in reply to amy2730Jun 30, 2008. 1:16 PM
oops, sorry here's the direct link... Kombucha Mini Course

I just signed up and the first day was all about the history of the scoby... pretty cool info, but I can't wait for the free videos!!
harleyxx says: Jun 29, 2008. 8:33 PM
I'm on my 6th batch of Kombucha, and love this stuff. The health food stores sell it for about $4.00 a bottle, so I have bottled mine up and have several weeks supply. I didn't like the green tea, it seemed to lack flavor so i switched to black tea. It's much better in my opinion. I drink a couple bottles of my own brew everyday for lunch instead of going to McDonalds and have lost about 15 lbs. For my last batch I substituted Orange Blossom honey for the sugar and it is by far the best tasting batch so far. I had to throw out my old mothers since none of my friends were willing to try it. Here are a few pics of my brew:
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Instuctable says: May 29, 2008. 3:17 AM
It would be a sin to keep it to myself, I just joined the site just to share this: you don't need to "get" the starter Kombucha "mother" -- you can make one in a couple of weeks yourself.
There aren't many things, so healthy, that are this simple. The yeast grows on the nutrients dissolved in the culture of boiled tea leaves plus sugar, right?
Make some tea or even use the remainder of some tea leftovers. Basically, to make a mother, a very small one at first, brew 1 tea bag in 1 cup of water and add 3 tsp of unrefined sugar in a clean jar covered with cheese cloth kept in place with a rubber band or a string tied around the top/lip. Let it sit in a dark place, allowed to "breathe" until a strange-at-first foam appears on top, in a few days it solidifies. That's the baby Kombucha mother, more or less yellow-beige and slimy. It will have a distinct sour, vinegary smell, and if you smelled it before you will be able to recognize it. Taste a tea spoon of it to make sure it’s Kombucha and/or wash the tea spoon and ask another connoisseur.
Just to pass on a warning, I understand some people achieved growing something else in such a culture – cool! I have not seen anything but a Kombucha culture come out of the following recipe. If it looks or smells more like mold than vinegar I would seek advice. For me, that had never been a problem. If it somehow got contaminated, be brave and throw the whole thing away. Start all over and keep it clean.
To make a few glasses of Kombucha, just to give you approximate proportions (and do experiment to find your own favorite) for a gallon jar (my favs are sun-tea jars with a tap) brew 4-7 teabags or tsps of black tea in a separate wide-mouth bottle, jar or a coffee pot, along with a cup of any, hopefully not very processed, sugar. Let it cool off to room temp, then gently pour all of the above into the jar along with the Kombucha mother and the liquid it’s in. For a sure new “start” never transport the mother alone without it’s liquid. Cover the jar with a cheese cloth or whatever will let Kombucha breathe and keep bacteria, mold and tiny fruit flies away. Let it sit for 1 to 3 weeks, taste it by pouring out a sip at a time, do not drink form the Kombucha jar – keep it as sterile as reasonable.

Once you make your first batch, you may well wish to experiment. Here are some of the main variables:
1. The size of Kombucha mother mushroom. Of course the bigger it is the faster it will eat up the sugar, ferment, convert it into the elixir we know. But if it gets too thick, more than 2” or so (and in the right conditions it grows quite fast) it may not be able to “breathe,” so it’s lowest part will look not too appetizing, which means it’s time to either give a horizontal slice of it to a friend or start another jar!
You can make it a batch at a time or pour yourself a cup or more every day if you add as much brewed tea and sugar back. In case of batch making, you will get a new layer of mother with every batch, then you can discard the lower portion or let it “seed” a new Kombucha mother. The lower, older mother may look like it died making a new one. Actually, it being a conglomeration of billions microorganisms -- they just traveled upwards, towards the air.
The horizontal size of the mother will be only as big as the surface air it can reach.
2. Second biggest variable is the amount of sugar, simply put, the more sugar the “stronger” is faster your Kombucha will develop. Experiment.
3. Time it is allowed to ferment determines it’s acidity, effervescence, alcohol content (usually .5% to 1.5%) and taste. When you like the taste, remove (possibly, not necessarily, using a sieve) all but a couple of cups from the Kombucha jar (now it’s ready to start another batch) and pour them into smaller bottles with good lids (no metal touching nowhere.) Let them sit at room temp for a couple of days, to increase effervescence and sharpen taste, or refrigerate them right away. Again, experiment, it is hard to go wrong, some of your “bad” batches may taste better than some commercial ones!
4. Try different teas and additional flavors, like ginger, mint, lemon, et cet, added before or after brewing. To be honest, I have not ventured that far to be an expert of what is best before or after.
5. Your ingredients and patience (or forgetfulness) will determine the final taste.
6. Last but not least is the temperature during brewing/fermentation. Warmer, but not too warm (70-85F) is best, whereas slightly below room temp is not a problem, but will certainly take longer to ferment.

Fermentation depends on these variables in a very simple way, higher temp –or- more sugar –or- more time = more fermentation. Too much or too little of either may prevent proper fermentation. In hot climate, it may be advisable to brew it slower, like in a cool/cold basement or the lower part of the fridge.

Important:
1. Do not use anything that may have or had preservatives – it will harm Kombucha, possibly producing a dubiously-healthy mold.
2. Keep everything clean, very preferably all glass. Kombucha is both sweet and acidic – it will dissolve some plastic and may imbed or damage wooden or rubber surfaces.
Try not to touch the culture or the brew to decrease the risk of contamination. When you transport it, and simply pouring it out is not possible, handle it’s slimy layers only with freshly soap-washed hands. Enjoy the feeling!
3. Use boiled water to evaporate the chlorine in tap water. Bottled or clean well water should be fine.
4. The Kombucha mother is a friendly yeast colony, a live culture – treat it lovingly, really.
5. Use everything organic. Did somebody actually ask why?

Enjoy, may you be healthy!
JKibs95 in reply to InstuctableJun 2, 2010. 7:43 PM
I think this comment warrants a new Instructable... Thanks
Flumpkins in reply to InstuctableOct 11, 2008. 8:14 AM
That is the longest comment I have ever seen!
lordofthedonuts in reply to InstuctableSep 29, 2008. 11:46 AM
You should really make an Instructable about it, your tips are very useful! I think if you make an 'ible about it more people will see your tips. And Btw, does it have a strong smell this way? Because I'm planning to brew my Kombucha in my lockera at school, since I never open it.
nthmost in reply to InstuctableJun 23, 2008. 3:47 AM
Just to boil this post down for people (pun intended), the gist is:

You can make more kombucha by using a commercial bottle of kombucha. There is enough viable culture swimming in that liquid. Get as many of the "floaties" you can into your brewing jar and just start feeding it.

My own caveats about this -- potential downsides of this method:

  • Low success rate for novices to the brewing process
  • Much higher chances for contamination since the culture is very weak
  • Takes a long time (up to 30 days) to generate a strong mother
So...

Whenever possible, and especially if you are a newbie to the world of kombucha, acquire a strong mother rather than trying to generate one from a commercial liquid.

And if you still want to try doing kombucha this way, see if you can make friends with someone who's been into it for a while -- you'll benefit from their experience and intuition, because they'll be able to tell you whether the brewing process is going well.
shalow in reply to nthmostNov 5, 2011. 6:41 PM
I believe you may have miss read the top part, he says you can make a mother without any kombucha.

Also while he says it only takes 5 days from the foam to form, til you have a small mother, he doesnt say how long time it takes for it to form the foam, but i doubt it would take 3 weeks for the foam to form.

At any rate this is an interesting experiment and I now have 3 cups of tea hidden away in a cupboard, heh
harleyxx says: Apr 21, 2008. 6:28 AM
Finally got some Kombucha mother form getkombucha.com and started two batches on Fri 4-18-08. For one batch I used green tea, for the other I used regular Black tea.
harleyxx says: Apr 7, 2008. 8:39 AM
I'm in the Daytona Beach area. Anyone close by willing to donate some mother for my first batch?
discontinuuity says: Mar 29, 2008. 1:47 PM
So I have most of the materials ready to make my own kombucha, but I have a couple questions. First, is it possible to use beer bottles to bottle this stuff? I drink more beer than I do anything that comes in PET bottles. How long would I let it pressurize before putting it into the fridge? Second, can I use other sweeteners such as honey? Third, what would happen if I add baker's or brewer's yeast to the kombucha culture? Would one kill off the other? Would it make more alcohol?
Aerospaced says: Mar 7, 2008. 5:12 PM
If it hadn't been for your reference to Sebastopol, I wouldn't have known wich "bay area" you were in. As for the hotch, I see you havent pasturized the wort. Hmmm, I'll pass on that one. BTW my bay is Tampa. Used to be Monterey.
metaldefektor says: Mar 7, 2008. 4:50 PM
About making the culture? It's so lovely that so many people are so happpy about this amazing drink but I really want to make my own culture, there are lots of exelent comments about making the Kombucha from the culture and to much to read but I didnt browse anything about making culture itself- SWEET!
dillweed says: Mar 5, 2008. 12:05 PM
me me me... i'm in cambridge. it will be a gift for mi gf. how can i get some?
stasterisk in reply to dillweedMar 6, 2008. 2:00 AM
MITERS has a mother. I have a mother. Lots of people have mothers! Pop into MITERS on Friday, and I'll peel you off a slice of the culture!
dillweed in reply to stasteriskMar 7, 2008. 12:08 PM
treehugger helped me out there today. it's so slimy.
dillweed in reply to stasteriskMar 6, 2008. 6:58 AM
comin. i always wanted a piece of yer mom.
shooby says: Nov 20, 2007. 2:36 PM
So the starter is a solid block made by the suspended ingredients settling on the bottom during fermentation, right?
sehrgut in reply to shoobyJan 28, 2008. 9:42 AM
Actually, the starter is a solid block made by the suspended bacteria and yeast floating to the top and getting caught in a mat of jelly secreted by one of the bacteria. The technical term is a "zoogleal mat" (which rougly translates to "a layer of glued-together animals").
IvanJM says: Oct 14, 2007. 12:04 AM
A couple of things. First, it contains both yeast and bacteria. The type of yeast is similar to beer yeast. The bacteria is similar as is used to make vinegar. The yeast breaks the sugar into simpler sugars, CO2, and alcohol. The bacteria convert the sugars (glucose) and alcohol into weak acids. Drinking early will have stronger yeast populations so will have more fizz and a sweater taste. Just don't wait too long, most don't like it too acidic. At no stage is alcohol normally near 1%. Second, brewing your tea in a metal container is fine. It's just not a good idea to use metal with the finished product. Because the finished product contains acids it will react with most metals. Many of the compounds created in this way are toxic. Though it would be extremely rare for these toxins to have noticeable affects until levels had built up over time. Arwen, I'm curious to know how you would describe the differences in flavour between hot and room temp. steeping. And have you tried syrups? I know most places will say it's best to use white sugar only, but I believe this is based on a paranoia that the yeasts and bacterias will be disrupted, lost, or what have you. Syrups are easy to make and probably safer than a second ferment with raw or dried fruit because they are heated.
ofmay in reply to IvanJMDec 19, 2009. 7:45 PM

I do not use white sugar if I have to I use unrefined. But my preference is to used Maple Syrup or Guava or honey.  I use a 2 gallon crock and brew the tea in the crock pouring the sweetener in first followed by the hot water slurring briskly from the bottom and finely tea bags. The 10 bags go in for 10-15 minutes. Set the crock on a cooling rack. The next day add the mother when cooled with some extra butcha juice.  2-3- weeks not to tart not to sweet!

Doctor What says: Oct 12, 2007. 2:19 PM
Fermented, Yeast... Sounds alcoholic. Is it? If so, can i make a virgin type? I'm not a fan of alcohol, and i'm 16.
maven in reply to Doctor WhatNov 11, 2009. 5:40 AM
the alcohol is converted by the mother to vinegar. That's basically what the Kombucha mother is - a mother of vinegar with some extra bacteria thrown in.  If there's any alcohol left, it's only trace amounts.  Kombucha tastes (to me) like fizzy apple cider vinegar.
arwen (author) in reply to Doctor WhatOct 12, 2007. 2:24 PM
As far as I know, it's *slightly* alcoholic, but not enough to get drunk on by any means. It's sold in grocery stores in San Francisco in the refrigerated juice case and there's no mention of any alcohol content, so it must be too negligible to mention.
Doctor What in reply to arwenOct 15, 2007. 2:22 PM
Yay, now i can actually try the stuff. The only reason that i had a concern is that my dad used to make alcohol, and the process sounded all too familiar. but at least now i don't have to worry about my kidneys.
keng in reply to Doctor WhatFeb 2, 2008. 9:40 AM
worry more about going blind 80))))
Rick500 in reply to kengMar 5, 2008. 5:44 PM
Only have to worry about going blind if you drink wood alcohol, not alcohol produced by yeast.
georgedotcom in reply to Rick500Mar 13, 2008. 11:29 AM
Yeast produce both wood alcohol and grain alcohol at the same time. That is why poorly made moonshine causes blindness.

Most commercial distilled spirits are full of alcohols and other compounds you don't want. It is those compounds that cause headaches and other hangover symptoms. don't fool yourself into thinking you aren't drinking wood alcohol too...

The better spirits must be distilled a large number of times to get the bad alcohol seperated from the good. Very little that you can buy in the liquior store has been properly purified. There is one brand of vodka that is almost free of wood alcohol and other contaminates... It's made in texas, and they have a great website that talks about this contamination issue.

http://www.titos-vodka.com
King of the wasteland in reply to georgedotcomMar 23, 2010. 2:11 PM
Thats simply an ignorant statement. The alcohol that causes hangovers are called fusel alcohols. many of which are toxic. Most are produced late in a distilation run. NOT in a simple fermentation of food grade ingredients. people went blind from additives such as methanol used to stretch the booze further. Note i said ADDED. Methanol is produced in small quantities by fermentation but negligible. for more real info on alcohol production and it's many myth read ""The Compleat Distiller" Happy brewing.
King of the wasteland in reply to King of the wastelandMar 23, 2010. 2:17 PM
Methanol is produced in small quantities by DISTILATION but negligible. for more real info on alcohol production and it's many myth read ""The Compleat Distiller" Happy brewing.

Sorry for the typo! Alcohol does that sometimes.
maven in reply to georgedotcomNov 11, 2009. 5:44 AM
And here I thought it was the lead solder in the car radiators they used for condensers that caused the trouble!  Well, that and the methanol and lye added for "flavor".
cmistark in reply to georgedotcomJul 22, 2008. 11:37 AM
If you want to do it on the cheap, just run your cheap vodka through a carbon filter (ie Brita) a few times (four is what I've heard is best)
porcupinemamma in reply to cmistarkNov 11, 2009. 5:59 AM
You've got me thinking about the Britta idea-I very rarely drink alchohol, so that's not a project that would be too high on my list of "wanna try", but any other fun ideas that a Britta could be used for?
cfuse in reply to porcupinemammaDec 10, 2009. 5:20 PM
I've heard (but not tried myself) that the brita + cheap vodka trick works on a lot of liquids - including orange juice. Basically, if your drink is both cheap and evil tasting, then it may be worth running it through a couple of times to see what happens.
lantz in reply to georgedotcomApr 4, 2008. 2:00 PM
(removed by author or community request)
Rick500 in reply to lantzApr 4, 2008. 11:03 PM
Yes, so if you don't distill at all, but only ferment (as in brewing beer, etc.), there is no chance of producing methanol.
Rick500 in reply to georgedotcomMar 13, 2008. 12:47 PM
My understanding is that wood alcohol (methanol) is not the result of fermentation, but of only distillation.
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