bowl of egg white
Egg whites are an excellent source of high-quality complete protein with minimal fat and cholesterol, containing all nine essential amino acids. They also provide B vitamins, particularly riboflavin and selenium, with negligible carbohydrate content.
About
Egg white, or albumen, is the clear, gelatinous protein-rich liquid surrounding the yolk within an egg. Derived from chicken eggs (Gallus gallus domesticus) and other avian species, egg white comprises approximately 90% water and 10% proteins, primarily ovalbumin, ovotransferrin, ovomucoid, and ovomucin. The substance transitions from viscous liquid at room temperature to a firm, opaque solid when heated, a process driven by protein denaturation. Raw egg white is colorless and odorless with a mild, neutral flavor that becomes more pronounced when cooked.
Egg whites from different avian sources—including duck, quail, and goose eggs—vary slightly in composition and functional properties, though chicken egg whites remain the culinary standard. The albumen itself consists of four distinct layers of varying viscosity, though these distinctions are largely immaterial in most culinary applications.
Culinary Uses
Egg whites serve as a fundamental ingredient across numerous culinary traditions, valued primarily for their protein content and functional properties as binding, leavening, clarifying, and glazing agents. They are essential in meringues, soufflés, angel food cakes, and whipped foam preparations where their ability to incorporate air and stabilize foams is critical. In French cuisine, egg whites clarify consommés and stocks; in molecular gastronomy, they create spheres and foams. Scrambled or poached egg whites provide a high-protein, low-fat preparation popular in health-conscious cooking. They also function as binders in forcemeats, patés, and some sausages, and as an egg wash for glazing baked goods before cooking.