Nonfat dry milk is useful in baking to add smoothness, tenderness and flavor to baked goods. I use it, along with my all purpose GF flour blend and cornstarch, to build a GF pastry flour.
Expandex Modified Tapioca Starch
Expandex modified tapioca starch is a chemically, not genetically, modified tapioca starch. Use it to build my gluten free bread flour blend and make the best breads of your life.