Quick Substitute for Baking Powder

There’s nothing more frustrating than being in the middle of a recipe and realizing you’re out of an important ingredient. Some things you can substitute, but others, like baking powder, you can’t. The chemistry in baked goods just doesn’t work out right. But, if you happen to have baking soda, cornstarch, and cream of tartar, you can make your own baking powder. Mix one tablespoon baking soda, one teaspoon cornstarch, and one and a half tablespoons cream of tartar together.