Here is a new flour mixture I have been using in all my recipes:
1 part brown rice flour
1/2 part sorghum flour
1/4 part tapioca flour
1/4 part millet flour
*Using rough estimates for the four parts is fine. It doesn't have to be exact. I mix up all four flour and then use it as an all purpose flour
If you have a local health food store, they probably have flour in bulk. I go to Manna Mills in Mountlake Terrace for my flour. Prices range $1.75-2.15 per pound.
