Vinegar Mothers and Acetification

Vinegar production through acetification — the conversion of alcohol to acetic acid by Acetobacter bacteria — is one of the oldest fermentation traditions in the world. Every wine-producing culture independently discovered that exposed wine becomes vinegar. The mother of vinegar (a cellulose mat produced by Acetobacter) has been passed between producers as a living starter culture for centuries. Noma documented the precise conditions for controlled vinegar production from any alcoholic base.

The conversion of an alcoholic liquid (wine, beer, cider, kombucha, fermented fruit juice) into acetic acid through the action of Acetobacter bacteria in the presence of oxygen. Unlike lacto-fermentation, acetification requires oxygen — it is an aerobic process.

House-made vinegar carries the flavour of its alcoholic origin — wine vinegar tastes of wine, cider vinegar of apple, sake vinegar of rice. Commercial vinegar is standardised; house-made vinegar is specific. The base material determines the flavour, making vinegar production a direct extension of the culinary philosophy of sourcing and identity.