To make this Easy Peanut Butter Brownie Swirl Cookies recipe gluten-free. Simply replace the all-purpose flour. With a 1:1 gluten-free flour blend. That includes xanthan gum. Which helps maintain the cookie’s texture. Be sure to also check. That your baking powder and baking soda are gluten-free. As some brands may contain traces of gluten. With these easy adjustments. You can enjoy the same soft, chewy cookies. With all the delicious swirls of peanut butter and brownie. But in a completely gluten-free version!