Some Surprising Facts About, McDonald's, That You Probably Didn't Know.br Yahoo recently released some little-known br facts about McDonald's, the world's br most famous fast-food chain. .br In 1948, the McDonald brothers' br original restaurant only had br nine items on its menu:.br In 1948, the McDonald brothers' br original restaurant only had br nine items on its menu:.br hamburgers, cheeseburgers, br soft drinks, milk, coffee, br potato chips and pie.br hamburgers, cheeseburgers, br soft drinks, milk, coffee, br potato chips and pie.br At the time, br a McDonald's burger br cost just 15 cents. .br One year later, in 1949, potato chips br were replaced by french fries br and McDonald's added milkshakes to its menu. .br One year later, in 1949, potato chips br were replaced by french fries br and McDonald's added milkshakes to its menu. .br In 2021, McDonald's global br earnings surpassed $112 billion.br The chain is now estimated to sell br approximately 75 burgers every second. .br That's 4,500 burgers every minute. .br In 1967, owner and operator Jim Delligatti br of Pittsburgh, Pennsylvania, created br the first Big Mac sandwich. .br In 1967, owner and operator Jim Delligatti br of Pittsburgh, Pennsylvania, created br the first Big Mac sandwich. .br The next year, it would be introduced nationwide. .br A 21-year-old secretary for the company's br advertising department, named Esther Glickstein Rose, br is credited with naming the burger the 'Big Mac.'.br A 21-year-old secretary for the company's br advertising department, named Esther Glickstein Rose, br is credited with naming the burger the 'Big Mac.'.br The Happy Meal, which was introduced nationwide in 1979, was the idea of an employee in Guatemala named Yolanda Fernández de Cofiño. .br The Happy Meal, which was introduced nationwide in 1979, was the idea of an employee in Guatemala named Yolanda Fernández de Cofiño.