1.Cook apple with 1 tablespoon butter, brown sugar, and cinnamon. Let cool for 7 minutes.
2.Whisk together flour, baking powder, baking soda, and salt in a small bowl. Set aside.
3.In a medium bowl whisk together sugar, buttermilk, egg, and 2 tablespoons melted butter.
4.Add dry ingredients to wet and gently whisk until incorporated. Fold in apple mixture to the batter. In a small bowl combine powdered sugar, milk, and vanilla. Set aside.
5.Cook waffles on a waffle iron for 3-4 minutes. Dip or drizzle glaze on top of waffles. Enjoy!