Preheat oven to 175°F and heat waffle iron.
In a large mixing bowl add wet ingredients and whisk until well combined.
In a separate medium mixing bowl, add dry ingredients and whisk.
Slowly pour dry ingredients into bowl with wet ingredients. Using a spatula, fold mixture until ingredients are well incorporated. Do not overmix. Batter will be slightly lumpy.
Brush waffle iron with melted butter. Pour batter into waffle mold (amount will vary depending on waffle maker model).
Cook until waffle maker indicates waffle is "cooked".
Remove and place on a plate. Keep warm in oven until ready to eat.
If making whipped mascarpone, see below. Otherwise top with butter, dusting of pumpkin pie spice, and maple syrup.