If you want to make these Sweet and Tangy Citrus Butter Cookies gluten-free, it's actually super simple. Just swap out the regular all-purpose flour for a good gluten-free flour blend. You know, one of those that already has xanthan gum or some kind of binding agent in it? That’s key to keeping the cookies from falling apart. Most of the other ingredients are naturally gluten-free, so you don’t have to worry about changing anything else. Just make sure your baking powder and any other add-ins (like the zest and juice) are all certified gluten-free. The cookies will still have that same zesty, buttery goodness, and no one will even miss the gluten!