A double boiler (also known as a bain marie) is a utensil and a cooking technique. One container with food to be cooked is placed in another, larger pan containing water that is at the simmering point. This method of cooking surrounds the food with very gentle heat and is used for cooking delicate dishes like custards or white sauces, or melting chocolates.
To make your own simply place a pyrex dish in a over a stock pot partially filled with water (shown above).
