each egg

An egg is the reproductive body produced by female birds, most commonly domesticated chickens (Gallus gallus domesticus), consisting of a protein-rich white (albumen), a nutrient-dense yolk, and a protective calcium carbonate shell. Eggs are one of the most versatile and fundamental ingredients in global cuisines, prized for their binding, emulsifying, leavening, and coagulating properties in cooking. The yolk contains lipids and fat-soluble vitamins, while the white is primarily protein with minimal fat, making eggs nutritionally complete. Chicken eggs vary in size (small, medium, large, extra-large) and color (white or brown shells), though shell color does not affect nutritional content or flavor. Other bird eggs—quail, duck, goose, and emu—are also used in specialized culinary applications.

The flavor of eggs is subtle and delicate, becoming more pronounced when cooked. Storage temperature and age affect both taste and cooking performance; fresher eggs have firmer whites and more centered yolks, while older eggs are easier to peel when hard-boiled.

Eggs function across virtually all culinary traditions and preparation methods. They serve as binding agents in meatballs, sausages, and baked goods; as leavening agents in soufflés, cakes, and meringues; and as emulsifiers in mayonnaise, hollandaise, and custards. Eggs are prepared whole through cooking methods including frying, boiling, poaching, scrambling, and baking. They are essential to pastry work, sauces, and desserts, and integral to dishes such as omelets, frittatas, quiches, and shakshuka. Beyond their structural roles, eggs provide richness and depth to soups, pasta doughs, and ice creams. Regional cuisines employ eggs distinctly: French cuisine emphasizes them in sauces and pastry; Asian cuisines feature preserved and cured egg preparations; and many Mediterranean dishes center on egg-based sauces and enriched preparations.