Preheat the waffle iron fully
Separate the eggs
Whisk the dry ingredients together
Whisk the wet ingredients together
Mix the wet and dry ingredients until just combined
Fold in the egg whites if using
Let the batter rest for 5 to 10 minutes
Grease the waffle iron lightly
Use enough batter to fill the iron without overflowing
Cook until the waffles are deep golden brown
Keep the waffles in a single layer on a wire rack
Avoid stacking the waffles
Place finished waffles in a low oven to stay crisp
Serve immediately