All of our recipes use our own All Purpose Flour Blend of superfine ground rice flours, tapioca, potato starch and xanthan gum. You should be able to substitute your favorite cup-for-cup gluten free flour in these recipes. However, different flour blends can behave differently, so as with all gluten free baking, you may need to tweak the moisture a bit to get the perfect outcome. Please contact us with questions or feedback about these recipes. We'd love to hear from you!