Well they must be good for you - he died at the age of 98! I remember when they first came out ... See below the other items he came up with for McDonald's.
The franchise-owner from Uniontown Pennsylvania put the stacked treat on sale at one of his restaurants in 1968.
McDonald’s initially did not approve of deviating from its strict formula of simple hamburgers, cheeseburgers and milkshakes.
But the creation of a two-patty burger with lettuce, cheese, gherkins, onions and “special sauce” proved an instant hit, and was rolled out to his other 47 outlets across the US.
His son revealed that Delligatti ate at least one 540 calorie Big Mac every week, according to CBS.
In 1970, he invented the Egg McMuffin which paved the way for the breakfast menu which started two years later.