"What is this for?" If your cooking utensils include a double boiler, you may have heard this question. You may have even asked it. Double boilers, while not a commonly used kitchen utensil, are extremely beneficial. They are perfect for preparing cream-based sauces and soups, or desserts requiring melted chocolate. Once you get comfortable using a double boiler, you'll wonder how you lived without it. A double boiler is essentially a thin-bottom pan inside another pan. To use the double boiler, ...