Turning these Apple Crisp Cookies into a gluten-free version is not only easy but also adds a whole new level of flavor and texture. Begin by substituting the pie crust with your gluten-free option – you can find some great choices, at local stores or even make your own using a combination of gluten-free flours. When it comes to the crumble topping make sure to use certified gluten-free rolled oats to avoid any cross contamination. Instead of all-purpose flour switch it up with a blend of gluten-free all-purpose flour; these blends are specifically formulated to replicate the texture and baking properties of regular flour.