Powdered milk is a dairy product made by evaporating liquid milk to remove its moisture content. This process results in a fine powder that can be reconstituted with water to create liquid milk again. It is often used in cooking, baking, and as a convenient alternative to fresh milk, especially in areas where refrigeration is limited. Powdered milk is available in various forms, including whole, skim, and non-fat options. It has a long shelf life, making it a popular choice for emergency food supplies and for use in products like infant formula and instant soups.