To make this Moist and Fluffy Lemon Yogurt Cake Recipe gluten free, replace the all-purpose flour with a certified gluten-free 1:1 baking flour blend. Verify that the baking powder, powdered sugar, yogurt, vanilla extract, olive oil, and all other packaged ingredients are gluten free. Avoid cross-contact by using clean bowls, utensils, measuring cups, and baking equipment. Check the cake early, as gluten-free flour blends may slightly affect baking time and texture.