Using a stand or handheld mixer, beat egg whites until stiff peaks form, adding in sugar towards the end.
Combine remaining ingredients (including egg yolks) in a separate bowl and stir together, making sure to not over-stir. Fold in the whipped egg whites, until just incorporated.
Cook in waffle iron according to waffle iron instructions.
Top as desired, with whipped topping, nuts, fruit, berries, syrup, etc.