Here's how you mix. 2 Parts Heavy Flour, 2 Parts Light Flour, and mixture of 2 Parts Starch. You can mix any variation of heavy to light etc. this is the mix that I think tastes the Best. After you mix this, store it in an airtight container. Makes 9 Cups total.
3 Cups of Quinoa Flour (light Flour)
3 Cups of Brown Rice Flour (heavy Flour)
1 1/2 Cups of Tapioca Starch
1 1/2 Cups of Potato Starch
A side note for baking. Because we are Gluten Free, we need to substitute for Gluten. In Wheat flour, Gluten acts as a gum. So, you will need to add a gum to this Gluten-Free mix when you are baking. I personally don't add it to the bulk mix, but rather mixing it into the actual batter when I bake. The rule of thumb is 1/4 tsp. gum per 1 cup of flour. I use guar gum, but xanthan gum is popular too. Just remember to add it in when you bake so that you get the same texture and consistency as wheat flour.