- eggs

Eggs are oval reproductive bodies produced by female birds, most commonly domesticated hens (Gallus gallus domesticus), consisting of a protective calcium shell, a translucent protein-rich albumen (white), and a nutrient-dense yolk. The hen egg has been a staple food for millennia across virtually all human cultures that have practiced animal husbandry. A standard large chicken egg weighs approximately 50 grams and is composed of roughly 73% water, 13% fat, and 12% protein, with the yolk containing most of the fat and cholesterol and the white being nearly pure protein. Eggs vary in shell color (white, brown, blue-green) depending on breed, with no nutritional difference between colors. Other edible eggs include duck, quail, goose, and ostrich, each with distinct flavor profiles and compositional differences.

Eggs function as a foundational ingredient across cuisines, serving simultaneously as a primary protein source and as a crucial binding, leavening, and emulsifying agent. They are prepared in myriad ways: cooked in the shell (soft-boiled, hard-boiled), fried, scrambled, poached, or baked; whisked into omelets and soufflés; incorporated into custards, ice creams, and mayonnaise; beaten to incorporate air in cakes, meringues, and angel food preparations; and used as a binding agent in meatballs, patties, and breadings. Eggs are indispensable in both savory and sweet applications, from French cuisine (mousse, hollandaise) to Asian preparations (tea eggs, egg fried rice) to American brunch culture. The yolk and white have distinct properties: whites coagulate at lower temperatures and whip to form stable foams, while yolks emulsify fats and enrich sauces.