I found this online and read about it in Living Healthy with Celiac Disease by Wendy Wark (AnAffect, 1998). It can be made with all white rice or a combination of both. I have also had good results substituting 1/4 cup of rice flour for sorghum or millet flour. This is a great gf all purpose mix to have on hand. It works like wheat flour in most recipes. In yeast bread recipes you may need to add more xanthan gum.