You can also use cream of tartar (potassium bitartrate) as an acid to make a buttermilk substitute by combining it with milk. This fine white powder is a byproduct of making wine and has a neutral ...
Dry powdered buttermilk ... especially when baking. Can I substitute sour cream for buttermilk? Yes, although you'll likely want to thin it out with milk or water to achieve a buttermilk-like ...