Separate your eggs into 2 different bowls. Add ½ teaspoon cream of tartar to the egg whites and beat them using a hand mixer until stiff peaks form. Set aside.
In a large bowl, combine all of the dry ingredients with a spoon. Add the egg yolks, vanilla, melted butter, pumpkin and buttermilk and combine. Gently fold in the whipped egg whites with a rubber spatula.
Cook the waffles in your waffle iron according to the manufacturer's instructions. Serve with warm maple syrup and a sprinkle of cinnamon.
Notes
Pumpkin WafflesHeat your oven to about 200 degrees F to keep waffles warm while you cook the rest. Place them on a half sheet pan lined with parchment paper or in a ceramic baking dish.