Fire up your waffle iron so that it can preheat while you assemble the batter.
Separate the eggs, placing the whites in a medium bowl, and the yolks in a large bowl.
Whisk the buttermilk, butter, and vanilla into the egg yolks.
Sift the dry ingredients (flour, baking soda, corn starch, and salt) into the wet ingredients and whisk to combine.
Use an electric hand mixer or a whisk to beat the egg whites and sugar until stiff peaks form (this is the work-out portion of the program, so you can burn some calories before you eat your weight in waffles and maple syrup). You've made a meringue!
Very gently fold the fluffy meringue into the waffle batter.
Following the directions on your belgian waffle maker, pour an appropriate amount of batter (our waffle make needs about a half cup of batter) into the preheated waffle iron and cook waffles.