Gluten-Free Boxed Cake Mix Replacer
Add 1 cup unsweetened cocoa powder for a recipe calling for a 19-ounce boxed chocolate cake. When using the cocoa, add it with the first ingredients so it will be sifted twice, together with the flours.
If you can't find rice starch, either replace it with arrowroot (maranta starch) or even gluten-free, unflavored rice cereal for babies.
To make into a cake, add 3 eggs, 1/2 cup butter or oil, 1/2 cup milk or milk substitute. Then bake at 330 degrees F (165 degrees C) for about 50 minutes. Makes one 9x13-inch cake.