What is the main function of a bain marie?

The main function of a bain marie is to keep foods hot. A bain marie, also known as a double boiler, is a cooking tool that consists of two nested pans. The bottom pan is filled with water and the top pan sits on top of the water. The heat from the water in the bottom pan gently warms the food in the top pan, helping to keep it at a consistent temperature without overcooking or burning it. Bain maries are commonly used in the restaurant industry to keep sauces, soups, and other foods hot and ready to serve. They are also used in baking to gently melt chocolate or to make delicate sauces that require precise temperature control. Therefore, the main function of a bain marie is to keep foods hot.