In a skillet, cook bacon until crisp. Drain; crumble and set aside.
In a mixing bowl, combine the flour, sugar, baking powder and salt. Beat egg yolks, milk and butter; stir into dry ingredients until smooth. Beat egg whites until stiff peaks form; fold into batter. Add bacon.
Before making each waffle, stir batter. Bake in a preheated waffle iron according to manufacturer's directions until golden brown.
Please Note: Nutritional values listed may vary from final results depending on actual measurements and brands used to prepare the recipe.