The Quarter Pounder is a hamburger sold by the fast-food chain McDonald's. It features a beef patty that weighs a quarter of a pound before cooking, which gives it a substantial size compared to other burgers. The sandwich is typically topped with cheese, onions, pickles, ketchup, and mustard, all served on a sesame seed bun. Introduced in 1971, the Quarter Pounder has become one of McDonald's signature items. It is available in various countries, sometimes with regional variations in toppings and ingredients. The burger is known for its rich flavor and satisfying portion, appealing to many fast-food enthusiasts.