Cream of tartar helps meringues for pies and other baked goods maintain fluffiness. You can create your own baking powder by combining ¼ teaspoon baking soda and ½ teaspoon cream of tartar, and it’s also good for cleaning copper cookware – just mix it with water to make a paste and rub it onto your pots and pans. If you’re a kindergarten teacher or have small kids at home, you can also use our cream of tartar to create your own homemade play-dough. Ingredients: Cream of tartar.