McDonald's is a iconic fast-food chain serving classic American fare with a global presence. The menu features an array of sandwiches, salads, breakfast items, and burgers made from beef, chicken, and other protein sources. McDonald's signature item, the Big Mac, consists of two all-beef patties, special sauce, lettuce, cheese, pickles, and onions on a sesame seed bun. Other popular options include the Quarter Pounder with Cheese and the French Fries.