Waffle making tips: Separate the yolks from the whites; Whipping the whites separately creates waffles with light and airy interiors. Incorporating the egg whites in thirds helps to prevent deflation of the whites while folding them into the batter. Gently mix when combining the wet and dry ingredients. Overmixing will develop the gluten in the flour and result in a tough waffle. Resist the urge to peek: Once the steam from the waffle iron dissipates, it is a good indication that the waffle is finished cooking. When making waffles, set your oven to 250 degrees F and place finished waffles on a baking rack, in a single layer, to keep warm in the oven. This will keep them crispy. Avoid stacking waffles, which can cause sogginess.