According to a composite of rankings compiled by food and business publications, French fries sit at the top of that list as McDonald's single best-selling item of all time. Just behind fries sits the Big Mac, the double-patty burger that has become nearly synonymous with the McDonald's brand itself since its national rollout in 1968. Built around a sesame-seed bun, two beef patties, lettuce, cheese, pickles, onions and the chain's signature special sauce, the Big Mac has remained a global fixture of the menu for more than half a century. On the breakfast side of the menu, the Egg McMuffin stands out as one of the chain's most consistently popular items since its introduction in 1972. McDonald's overall scale underscores why even modest per-item variations in ranking still represent enormous sales volumes.