Grain Free Baking Powder: 1 part baking soda + 2 parts cream of tartar + 2 parts starch (potato, arrowroot, tapioca). Sift all ingredients to they are evenly cobined and store in a glass jar for up to 1 month. I usually make a jar in 1 tablespoon measurements of each item.
If you don’t have cashews, use walnuts. You can also use 1/2 cup cashew butter or any other nut butter in “butter” form.