when did mcdonald's first start serving breakfast
History of McDonald's The company pioneered breakfast fast food with the introduction of the Egg McMuffin in 1972 when market research indicated that a quick breakfast would be welcomed by consumers. Five years later McDonald's added a full breakfast line to the menu, and by 1987 one-fourth of all breakfasts eaten out in the United States came from McDonald's restaurants. In test market locations, such as New York City, McDonald's added a full breakfast line to its menus in 1975.