Grease & Preheat waffle iron with a small amount of melted butter.

In a large bowl, whisk together dry ingredients.

In a separate bowl, whisk together egg yolks, buttermilk, melted butter, and vanilla.

Pour into dry ingredients, and mix until just combined. (Resist the temptation to get all the lumps out!)

In a medium bowl, beat egg whites until stiff but not dry. Fold whites into batter.

Poor batter into waffle iron. You will have to experiment to see how much you need to get it to cook to the edges.

Close lid, and bake about 3 to 5 minutes, until it reaches your desired done-ness.

Keep waffles warm in a very low oven, while using remaining batter.