Did you know that you can culture your own buttermilk? By adding a small amount of store bought buttermilk to sweet milk, you can stretch that expensive store bought jug to several more quarts of buttermilk perfect for baking!
Bring 1/2 cup fresh buttermilk to room temperature. Add 3 cups of water and 1 cup powdered milk. Mix well, pour into a jar, and cover loosely. Let the milk sit on the counter for 24 hours. Then refrigerate.
Buttermilk! It's as easy as that.