QUOTE (shanluts @ May 16 2008, 06:17 PM)

Would you share how you make it? It is sooooo expensive at the HF store.
Shannon
It it quite easy to make, the only hard part is getting a starter (SCOBY). Once you obtain one (and some starter tea) you need only the following: 1 Gallon
glass jar, tea, sugar or
raw honey (if you can't get raw honey just use pure cane sugar), and a nylon or piece of cheesecloth that will cover the top of the jar securely.
I use the continuous brewing method and it is quite easy (and better than doing a whole batch at once for a number of reasons).
For your initial batch:
Let the scoby (starter) and starter tea come to room temp while you do the rest of this.
Take a gallon of water, 1 cup of cane sugar or honey, and eight tea bags, at least two of which must be caffeinated. These must not be fruit teas, though some herbal teas will work, but I'd suggest you start with plain green or black tea. Other teas can introduce unhealthy bacteria.
Clean out your gallon jar with some boiling water and vinegar. Do not use dishsoap or run it through the dishwasher.
Bring the water to a rolling boil and turn it off. As soon as it stops boiling dissolve the sugar or honey in it (stirring with stainless steel spoon or whip - not nylon/plastic/wood). This is the only time you should EVER use metal with your tea.
Place the teabags in the water and walk away. You want it to cool to ~80 degrees F, no warmer. If you have a candy thermometer you can use it, or you can drop some on the inside of your wrist to see how hot it feels. If you would give it to a baby (temp wise) in a bottle, it is probably about the right temp.
Remove tea bags. Pour about 3/4 of the mixture into your jar. Then add the SCOBY (Symbiotic Culture Of Bacteria and Yeast) and starter tea, gently placing the SCOBY into the jar. Do NOT ever use metal to touch the SCOBY or stir your tea after brewing the initial tea. Use your hand or a wooden/nylon spatula.
Then slowly pour the rest of the brewed tea over it, filling it to within about an inch of the top. You will probably have some brewed tea left over to drink.

Cover the jar with your cheesecloth or nylon. As it becomes more acidic it will attract vinegar flies. The cover keeps them and the dust out.
If your house is ~70-75 degrees, you will need to leave it for about 4 days. Cooler, add a couple days, warmer about three days.
Using a nonmetal dipper (or if you got a gallon jar with a dispenser spout) gently scoop some out and drink it slowly over a couple hours.
For the continuous brewing method, simply replace the amount you take out with an equivilent amount of tea. 2 Cup (16 oz) water + 1 teabag (make sure that at least every other teabag is caffeinated) + 1/8 cup sugar or honey will give you the correct proportions.
In the morning when I get up, I take out a glass of kombucha for my wife and I, pour two cups of boiling water, a 1/8 cup of honey, and a teabag into a glass measuring cup. Just before I leave for work it has cooled enough and I fish out the teabag and pour it into the jar. Total prep time: 5 minutes.
I'd suggest you initially start drink no more than 1/2 an 8oz glass as some people can get and upset stomach or other reaction. It will continue to get more acidic but if you replace daily the amount you take out with the sweetened tea, in about 14 days or so it will achieve what some people feel is best balance of acids.
The SCOBY will continue to thicken, and when it gets to about an 1" think, I take it out and clean the jar with boiling water and distilled vinegar.
Drinking small amounts throughout the day will provide a number of benefits, not the least of which is helping to keep the correct acidic balance in your gut which is conducive to good bacteria and not conducive to bad bacteria.
There really isn't much sugar in it or caffeine as the yeast and bacteria consume and metabolize them into a variety of acids.