To make these delightful Pecan Tassies suitable, for a gluten-free diet the key is to replace the regular all-purpose flour in the shells with a high-quality gluten-free all-purpose flour blend. Look for a blend that contains xanthan gum as it imitates the binding properties of gluten ensuring that your shells maintain their tender and flaky texture. When you're mixing the dough keep in mind that gluten-free flour blends may absorb moisture differently so adjust the texture by adding butter or a splash of milk if it seems too dry. The rest of the ingredients are naturally free of gluten making this adaptation simple yet effective.