Preheat waffle iron.
Get out three bowls.
In the largest bowl, add the flour, sugar, baking power, baking soda, salt, ginger, nutmeg, and cinnamon, stir until well combined.
Divide the eggs between the last two bowls, egg whites in one, yolks in the other.
In the yolks bowl, add the milk and pumpkin puree, stir until well combined. Add the melted butter and stir.
Using a hand mixer, beat the egg whites until stiff peaks form, about 4 minutes.
Add the pumpkin mixture to the dry mixture and stir until just combined, don't over mix. Add the beer and stir until combined. Gently fold in the egg whites.
Spray waffle iron with butter flavored cooking spray. Cook waffles according to manufactures directions.