Place the egg whites in a small mixing bowl; let stand at room temperature for 30 minutes.
In a large bowl, combine the flour, baking powder and salt.
Combine the milk, corn, egg yolks and oil; stir into dry ingredients just until combined.
Beat reserved egg whites until stiff peaks form; fold into batter.
Pour batter by 1/4 cupfuls into a preheated waffle iron; bake according to the manufacturer's directions until golden brown.