about 1 gallon of filtered water
6-8 black tea bags, preferably organic, for the healthy of the SCOBY
1 cup of organic white sugar, turbanido or rapadura. Succant isn't preferred.
1-2 cups of plain kombucha from previous batch (your SCOBY will come with some.)
1 SCOBY, acquired on line from a place like Cultures for Health or from a friend.
Make a batch of sweet tea, using the filtered water. A Brita filter system works fine. You want something that will remove the choline, or it will kill the SCOBY. When tea is room temperature, add SCOBY and Kombucha from previous batch. Cover with a tightly woven cloth (I used a t-shirt doubled over) and a rubberband. Fruit flies and gnats are attracted to kombucha I hear and you don't want them laying eggs in your SCOBY! I haven't had any problems, but it isn't exactly the season for them either.
Leave your covered Kombucha in a darkish place where it will be undisturbed for 7 - 10 days. Then bottle it. You can add fruit when you bottle it or add 1 tsp sugar per cup for plain Kombucha. If you use fruit, I'd say 1-2 whole strawberries per 16 oz. So it isn't much. If you use fruit juice you are only going to use about 1 oz to flavor 15 oz of Kombucha, it isn't much. Let sit at room temperature for 1-3 days (you can go longer, it will just get stronger.) Refrigerate and enjoy!
beer capper at Amazon for $15.) This time I just poured it in old yogurt containers, old juice bottles and a pickle bottle! Don't store Kombucha in plastic, it will kill the SCOBY.
UPDATE 3/17/11: My SCOBY (also known as a Mother) gave birth... I gave my first SCOBY away to my friend Wendy so that she can now make Kombucha at her house. Read more about her Kombucha project at her blog: Just One Momma.