SCOBY • THE ROLE OF MICROORGANISMS
SCOBY: The Role of Microorganisms
Kombucha starts with simple ingredients. BOUCHE Kombucha is made from filtered water, black and green tea, regional beet sugar, and a house-developed starter culture of yeasts and bacteria. Four ingredients, countless variables.
The starter culture is kombucha in concentrated form, comparable to a well-maintained sourdough. It carries the foundational acidity, gives fermentation its structure, and sets the entire microbial process in motion. So far, that sounds like chemistry. What follows is craft.
What the SCOBY does
Inside the fermentation tank, yeasts and bacteria form a symbiotic community, known as a SCOBY: Symbiotic Culture of Bacteria and Yeast. The yeasts process the sugar, producing CO₂ and trace amounts of alcohol. Lactic and acetic acid bacteria follow, converting that alcohol into organic acids and shaping the characteristic flavor profile of the kombucha in the process.
This interplay cannot be rushed. It follows its own rhythm, responding to temperature, culture composition, and the quality of the tea. Brewing good kombucha means learning to listen to that process.
BOUCHE Insight: We work with this culture every day. Each batch behaves a little differently, depending on the season, temperature, and the specific lot of tea. That is not a flaw in the system. It is the system.
Why we stabilize
Fermentation is by nature an open process. Left unchecked, the kombucha continues to change: more acidic, drier, less precise. For a drink brewed in Berlin and opened several weeks later, that is not an option.
BOUCHE ferments fully, fills in-house, and pasteurizes only after filling. This step stops fermentation at the point where the flavor profile is most coherent. Not too young, not over-fermented. The organic acids, the tea aromatics, the gentle carbonation: all of it is preserved exactly as it was.
Pasteurization is not a constraint. It is the moment we decide: here. This is how it should taste.
What is in the bottle
Every bottle of BOUCHE contains the full results of fermentation: natural organic acids, polyphenols from the tea, gentle carbonation, low sugar. The profile is stable because we built it that way. It does not continue to develop, and that is precisely the point.
Whether cold or at room temperature, straight from the bottle or poured over a meal: BOUCHE tastes the way we brewed it. The craft is in the fermentation. The precision is in everything else.