All of my recipes are corn free. Unfortunately, where I live,
finding an ingredient like baking powder that does not have corn starch in it
is nearly impossible. So I took to the internet and my cookbooks to find the best
homemade alternative. Most sources agree that you can easily make your own using
the following formula:
1 Part Baking Soda
2 Parts Cream of Tartar
2 Parts Starch (Tapioca or Arrowroot)
I have been using this version for some time now and have
great results every time (OK, the recipes don’t always work but the leavening
does). Some do-it-yourselfers will use potato starch but my cooking is free of
nightshades like potato. Therefore, my starches are kept to Tapioca and
Arrowroot. I use both and find they work equally well, although the tapioca is
often cheaper. You might even omit the starch entirely if you will be using the
powder immediately and not storing it. Let me know if you have a different
formulation and how it works for you.