What is hooch in sourdough starter?

Hooch is a byproduct of fermentation in sourdough starter. It is a dark liquid that forms on the surface of the starter when it has been left for an extended period of time without being fed. Hooch is a sign that the starter is hungry and in need of feeding, as it is a result of the depletion of food sources for the wild yeast and bacteria in the starter.

Hooch can be stirred back into the starter before feeding, or poured off if desired. Some bakers enjoy the tangy flavor that hooch adds to their sourdough bread, while others prefer to discard it as it can make the starter more acidic and may result in a more sour bread.

Overall, hooch is a natural part of the fermentation process in sourdough starter and can be managed by regular feeding and maintenance of the starter.