The gluten free flour you use is really important for the texture of your cookies. If you use a coarse ground gluten free flour your cookies will have a gritty texture. It's important that you choose a flour that is specifically for baking. I like Namaste Gluten Free Flour, Bob's Redmill 1-to-1 Baking Flour and King Arthur Measure for Measure Gluten Free Flour. My baked goods have turned out well using any of these flours.