How to Make Baking Powder | Real Simple
Dec 21, 2017·RELATED: Baking Soda vs. Baking Powder: Here's the Difference If you have cream of tartar and baking soda on hand, you're seconds away from homemade baking powder. Using a ratio of 2 parts cream of tartar to 1 part baking soda, stir the two together until combined, then use the mixture in place of baking powder.