Step 1

Preheat waffle maker.

Step 2

Insert butterfly whisk. Place egg whites and sugar into mixing bowl, then whisk 2 min/speed 4, until stiff peaks form. Remove butterfly whisk. Transfer into a bowl and set aside.

Step 3

Place butter into mixing bowl and melt 2 min/70°C/speed 1.

Step 4

Add flour, milk, baking powder, salt, vanilla and egg yolks, then mix 10 sec/speed 5. Fold whisked egg whites into batter with spatula.

Step 5

Cook waffles according to waffle maker instructions and serve hot with toppings of choice (see Tips).