Melody,
Well, the site I posted has pre-packaged bread making products. In each and every product they say what it is made from... e.g.

"Pumpkin Bread Ingredients:

Crystallized honey, tapioca flour, arrowroot, chickpea flour, pinto bean flour, navy bean flour, potato starch, millet, Montina™ (perennial bunch grass, achnatherum hymnodies), maple sugar, cinnamon, ginger, clove, nutmeg, xanthan gum, cream of tartar, baking soda and salt."

They have many different types...

Depends on exactly what she can eat, Melody. If she's able to eat rice than I'm sure the rice crumb products in the shops would be just fine.