To make this Apple Pecan Cake gluten-free. Simply substitute the all-purpose flour. With a gluten-free baking blend. That contains xanthan gum. Be sure to check the consistency of the batter. As gluten-free flours can sometimes require a bit more moisture. You can add a splash of milk. Or buttermilk if needed. Also, double-check that your baking soda and other ingredients. Are certified gluten-free. With these simple swaps. You can enjoy all the delicious flavors of this cake. Without the gluten!