eggs

Eggs are the reproductive bodies produced by female birds, most commonly domestic fowl (Gallus gallus domesticus), consisting of a nutrient-rich yolk encased in albumen (egg white), all enclosed within a protective calcified shell. Chicken eggs are the most widely consumed eggs globally, with brown and white shell varieties differing only in shell pigmentation and breed origin, not nutritional content. The yolk ranges from pale yellow to deep orange depending on the hen's diet, while the albumen is clear and transforms from liquid to opaque upon heating. Eggs possess a mild, slightly sweet flavor that varies subtly based on the hen's feed and living conditions.

Other culinary eggs include those from quail (smaller, speckled), duck (larger, richer yolk), goose (large, robust flavor), and ostrich (equivalent to approximately 24 chicken eggs), each with distinct compositional and flavor characteristics.

Eggs function as a fundamental ingredient across virtually all global cuisines, serving multiple roles: as a primary protein source in preparations from simple boiled or fried eggs to omelets and scrambles; as a binding agent in meatballs, forcemeats, and terrines; as a leavening agent in cakes, soufflés, and meringues; and as an emulsifier in mayonnaise, hollandaise, and custards. They are essential to both sweet and savory cooking—from custard tarts and pavlovas to quiches and pasta carbonara. Preparation methods range from minimal cooking (soft-boiled, poached) to extended heating (hard-boiled, baked), with each method altering texture and nutritional bioavailability. Eggs pair effectively with virtually all vegetables, proteins, herbs, and fats.