To make these Sweet Potato Pecan Muffins with Cinnamon Glaze gluten free, replace the all-purpose flour with a gluten-free 1:1 baking flour blend that contains xanthan gum. Use certified gluten-free baking powder, baking soda, confectioners’ sugar, maple syrup, cinnamon, nutmeg, and vanilla if adding any optional flavoring. Check the labels on pecans and packaged ingredients to avoid cross-contamination. Allow the muffins to cool fully before storing, as gluten-free muffins can be more delicate when warm.