This apple cinnamon cake recipe is gluten-free and perfect for those who have celiac disease or gluten intolerance. It's made with almond flour, coconut flour, and gluten-free baking powder instead of wheat flour and baking powder. The cake is still moist, fluffy, and packed with apple and cinnamon flavors. To make this cake, you'll need almond flour, coconut flour, sugar, baking powder, salt, cinnamon, eggs, coconut oil, vanilla extract, and apples. Mix the dry ingredients in one bowl and the wet ingredients in another. Then, combine the two mixtures and fold in the chopped apples. Pour the batter into a greased baking pan and bake for 35-40 minutes. Serve warm with a sprinkle of powdered sugar.