(Gluten & Corn Free)
Ingredients:
1/3 cup Baking Soda
2/3 cup Cream of Tartar
2/3 cup Arrowroot (or potato starch)
Mix well. Store in an airtight container.
1-½ teaspoon of this mixture = 1-teaspoon of regular baking power

As always, Celiac.com welcomes your comments (see below).