SIFT TOGETHER ALL DRY INGREDIENTS. In a separate bowl, beat together the egg yolks, sour cream, milk and melted butter (or oil). Add to the dry mix. Mix together thoroughly. Beat egg whites until stiff, and fold in completely. Bake in preheated waffle iron. This delicious waffle recipe comes from Margaret Fox, who prepares wonderful breakfasts at her restaurant, Cafe Beaujolais, in Mendocino, Calif.