Oat flour is a gluten-free alternative that can be made at home, as in this recipe, from old-fashioned rolled oats. To ensure that your oat flour is gluten-free, be sure to purchase certified gluten-free oats. When processing the oats to make the flour, take care to not overprocess. Overprocessing the oats can result in gummy pancakes. Oats should look like fine sand but not powdery.