<P> 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 . </P>
<P> 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 . </P>
when did mcdonald 's first start serving breakfast
when did mcdonald 's first start serving breakfast
1972
1972