1 lb. barley flour (contains slight amount of gluten, check with your dr to see if it's allowed in your particular case.)
1 lb. potato starch flour (not plain potato flour)
1 lb. fine-ground maize flour
6 tsp. bread soda
3 tsp. cream of tartar
Combine all into a bowl or container, blending well. Store as you would any flour. Use as a substitute for white wheat flour.
* Caution: Read labels. *
Some products have hidden wheat or gluten ingredients.