Making this apple crisp with gluten instead of using gluten free ingredients or without any carb restrictions is an easy swap for the regular version if you prefer. First of all, you don't have to be mindful of the brand of rolled oats you're using. You can use any rolled oats that may have come into contact with some wheat along the way. You can also substitute the almond flour with all purpose flour or whole wheat flour in equal parts. Using flour in place of cornstarch in the apple mixture filling will also be great to thicken it if you prefer, but you will need to use roughly double the amount flour as you would to cornstarch. You can skip the xanthan gum. Xanthan gum is a common binder in gluten free ingredients, and you don't need it if you're using regular wheat flour.