2 cups all-purpose flour 2 tablespoons granulated sugar 1 tablespoon baking powder 1/2 teaspoon salt 2 large eggs, separated 1 3/4 cups milk 1/2 cup unsalted butter, melted 1 teaspoon vanilla extract
Preheat your waffle iron according to the manufacturer's instructions.
In a large bowl, whisk together the flour, sugar, baking powder, and salt.
In another bowl, beat the egg whites until stiff peaks form.
In a separate bowl, whisk together the egg yolks, milk, melted butter, and vanilla extract.
Pour the wet ingredients into the dry ingredients and stir until just combined. Do not overmix; it's okay if there are a few lumps.
Gently fold in the beaten egg whites until just incorporated.
Grease the waffle iron with non-stick cooking spray or brush with melted butter.