The Friendship Cake Starter

Mix in plastic or glass container with lid. Cover, store at room temperature for 17 days, stirring once a day. After that, leave undisturbed for 1 day. Stir again daily for 3 days. Add 1 cup each of sugar, milk, and flour, then stir the next 4 days. Add another cup of each sugar, milk and flour. Mix well. Give 1 cup each to 2 friends, use 1 cup to make a cake or use as base for another batch of starter.