No. 133 How to Make Good Yeast
Take 6 large sound potatoes, 1 gallon of water, and 2 ordinary handfuls of hops; put the potatoes, after peeling them, into the water, tie the hops into a bag, and boil all together till the potatoes are soft enough to mash easily; throw the hops away, put a cupful of flour in a large dish, take the potatoes out of the water, mash them through a colander, and mix them well with the flour; then pour the water used in boiling the potatoes over them, and mix the whole thoroughly; let the mixture stand till about milkwarm, and then add about a cent’s worth of baker’s yeast or an yeast cake, or a cupful of dry yeast, and after stirring it again set the whole, away over night; in the morning add a half cup of sugar, a half cup of salt, and a small tablespoonful of ginger; put the whole in a two gallon jug, and use a cupful of this yeast at a baking for five or six ordinary-sized loaves. When you make your next lot of yeast use a cupful of this yeast instead of the baker’s or other yeast called for above.