2 tablespoons maple syrup for drizzling (optional)
Preheat the oven to 400 degrees F and the adjust rack to middle position. Place the apples, coconut sugar, butter, and cinnamon in a medium bowl and stir until combined. Pour the apple mixture into a 10″ cast iron skillet (or buttered 9″ pie plate). Set aside.
Blend together the eggs, coconut sugar, milk, coconut flour, tapioca flour, arrowroot, cinnamon and vanilla in a blender until smooth. Set aside.
Place the skillet with the apples in the oven and bake for 5 minutes. Carefully pull out the oven rack and quickly pour the pancake batter over the apples. Bake for 20-25 minutes until golden brown on top. Cool for 5 minutes. Serve with a small drizzle of maple syrup.