Kombucha is a fizzy, fermented Beverage made from tea, sugar, and a SCOBY. If you are wondering what is kombucha?, it is a healthy drink with all of the probiotics that are good for your gut. The kombucha SCOBY (a Symbiotic Culture of Bacteria and Yeast) is what does the work, it ferments the tea and gives kombucha its flavor and benefits.br br Looking for a simple Kombucha recipe? You only need these things to get started, tea, sugar, and a SCOBY. The definition of kombucha is simple: a naturally fermented tea that is refreshing and good for your digestion.