In a large bowl, combine the first seven ingredients. In another bowl, whisk the eggs, egg whites, buttermilk, applesauce, oil and butter; whisk into dry ingredients just until blended.
Bake in a preheated waffle iron according to manufacturer's directions until golden brown. Serve with butter and syrup if desired. Freeze option: Cool waffles on wire racks. Freeze between layers of waxed paper in a resealable plastic freezer bag. To use, reheat waffles in a toaster on medium setting. Or, microwave each waffle on high for 30-60 seconds or until heated through.