To make these Holiday Peanut Butter Crinkles gluten-free, substitute the all-purpose flour with a 1:1 gluten-free baking flour blend that contains xanthan gum. Ensure all other ingredients, including baking powder and powdered sugar, are labeled gluten-free. The dough may be slightly softer, so refrigerate it for 15–20 minutes before shaping if needed. The result will still be delightfully chewy with the same festive, snowy finish.