Step 1

Preheat waffle maker.

Step 2

In a large mixing bowl, whisk the flour, sugar, baking powder, and salt together until combined. Create a well in the center of the bowl and set aside.

Step 3

In a second, smaller bowl, mix the egg yolks, milk, butter, and vanilla together, whisking to combine. Add the contents of the bowl to the dry ingredients and whisk until combined.

Step 4

Place the egg whites in a small bowl and whip with a whisk or hand mixer until stiff peaks form. Gently fold the whipped whites into the waffle batter.

Step 5

Cook ½-¾ cup of batter in the hot waffle maker until cooked through and golden brown.