Milk
In cooking some kinds of food, milk is used instead of water. Milk being thicker than water, less of the steam escapes, and it becomes hot sooner than water, adheres to the pan, and burns easily. At its boiling temperature (214 degrees), the casein contained in milk is slightly hardened, and its fat rendered more difficult of digestion. By heating milk in a double boiler, these dangers are avoided. It then only reaches a temperature of 196 degrees, and is called scalded milk. The process is a form of steaming.