To make this Apple Bottom Hootenanny Pancake Recipe gluten free, replace the all-purpose flour with a high-quality 1:1 gluten-free baking flour blend that includes xanthan gum. Confirm that the vanilla extract and powdered sugar are certified gluten free, as some brands may contain additives or be processed in facilities with gluten. Because gluten-free batters can behave a little differently, the final texture may be slightly more delicate, but the pancake should still puff nicely and bake up beautifully.