Sour Cream Belgian Waffles The secret to light and crispy Belgian waffles is folding in the egg whites. Throwing them in with the egg yolks will work, but you'll get a heavier waffle 1-1/2 Cups All-purpose flour 2 Tbsp. Sugar 1 Tbsp. Baking powder 2 Eggs 1 Cup Sour cream 1-1/2 tsp. Vanilla extract 1 Cup Milk 1/4 Cup Margarine, melted