How do you grow yeast? ​

Like, to keep up a steady supply not within a food product.

@pamela sourdough starter is basically just this, just slightly funkier yeasts than you’d get in a supermarket packet and the answer there is just give it fresh flour on the reg?

I assume the mass produced version is much more sterile and temperature controlled and probably maybe using some sort of engineered carb but fundamentally not that different

@Satsuma they're gluten-free so I'm really curious what they're fed. I can't find a lot of information about things like how you'd use your homemade yeast starters to do things like soda or beer instead ​

@Satsuma rather, how people would have done it on the frontier, for example. Yeast in cake form can't be that complicated but I don't think it's actually that old, either.

@pamela i think most people who do sodas use cultures that eat white sugar—I have made self-carbonized kombucha before, which eats tea and sugar for example. Which is I guess one way of solving the problem of how to get the yeast into your soda without putting a ton of flour in also I guess?

Old school beer brewing I believe you reserved some of the mash to use as a starter for the next batch. Wine and apple cider can both be done 100% with the yeast that lives on the skins of the fruits, so technically not required to grow a separate yeast supply.

@Satsuma thanks! I wonder if an apple would like to try starting some ginger ale for me? ​ ill see what sorts of critters I have access to