The batter must be made 12 to 24 hours in advance. Texture of the waffles made in a classic waffle iron is better. But a Belgian waffle iron will work, though it will make fewer waffles. The waffles are best served fresh from the iron but can be held in an oven until all of the batter is used. As you make the waffles, place them on a wire rack set above a baking sheet, cover them with a clean kitchen towel, and place the baking sheet in a 200-degree oven. When the final waffle is in the iron, remove the towel to allow the waffles to crisp for a few minutes. These waffles are quite rich; buttering them before eating is not need and may be to much for some.