Preheat a Belgian Waffle maker and grease with cooking spray or butter.
In a medium bowl, mix all dry ingredients together.
In a large bowl, beat eggs, buttermilk, pumpkin, and melted butter.
Fold the dry ingredients into the wet ingredients until just blended.
Scoop roughly 1/2 – 3/4 cup batter onto the waffle maker and bake until golden brown (most waffle makers have a light that turns green when they are ready).
Serve immediately with butter and syrup, if desired.