Gluten free all purpose mix/master baking mix

Gluten free all purpose mix/ master baking mix is the BEST for many items. This is from gingerlemongirl.blogspot.com. I have used this for soo many things. Pancakes is the BEST... Waffles, muffins, pizza crusts.. more recipes for this to follow.

2 1/2 cups brown rice flour
1 1/2 cups certified gluten free oat flour or millet flour (can use either)
1 1/2 cups tapioca flour
1 Tbsp + 1 tsp xanthan gum
2 tsp salt
3 Tbsp baking powder
1 1/2 cups powder milk
1/2 cup shorting (Butter one is best)

In a large bowl whisk all items together except shortening. Cut shortening into small pieces and cut into flour mixture. It will look like very tiny peas or specks of shortening through mix. It is AMAZING MIX. Use it with anything that calls for bisquick.