Preheat oven to 200 degrees and preheat a Belgian waffle iron (or standard waffle iron).
In a separate bowl, using an electric hand mixer set on high speed, whip egg whites** until soft peaks form. Add sugar and whip until medium-stiff glossy peaks form.
Cook batter in waffle iron according to manufactures directions. Once each waffle is done, transfer to warm oven and allow to rest to crisp further and keep warm. Serve warm with butter and maple syrup or other desired toppings.