Symbiotic Culture of Bacteria and Yeast

My kitchen has been sort of a microbiology laboratory with random fermentation projects that I get in and out of. I haven’t made any kimchi or natto in a while, but am currently growing a SCOBY and making kombucha.

A crunchy granola coworker brought me a bottle of fermented tea drink called kombucha, that she made at home. It was fizzy, mildly sweet, and a little fragrant. Very delicious. Then she told me how she grew her own SCOBY at home and provided me with a couple of jars to serve as my mother. And now I have my very own baby SCOBY.

First Fermentation
Here’s what I did.
Brew black tea.
Add a bunch of sugar. (I didn’t measure, but it was more than I would add to my tea if I’m drinking it myself. This is food for the yeast)
Wait for it to cool.
Rinse a clean glass jar with white vinegar. Pour out the vinegar.
Add the black tea and mother kombucha in the rinsed out glass jar.
Cover it with a paper towel and rubber band it on.
Put it in a dark area (warm part of the house).

Mine are sitting in a cabinet above the fridge. And even after a few days I could already start to see little wisps of the yeast. After a week, I had a thin layer of SCOBY. And at week 2, I started my second ferment.

Second Fermentation
Pour some of the kombucha into a jar (I’m using an old kombucha jar from the store), add a little fruit juice (maybe a ratio of 5 to 1 or so). Leave a little room for it to expand (fizzy air from the yeast). Put the lid on tight. Stick it back in the dark warm shelf for 2 to 7 days. Refrigerate and then done!

I’m currently at the second fermentation stage. I just have 1 jar. If this works out, I’ll be sipping on some by this weekend.

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