In 1974, the name “Special Sauce” was used in the famous advertising campaign: "Two all-beef patties, Special Sauce, lettuce, cheese, pickles, onions – on a sesame seed bun.“
The recipe was again tweaked in 1991 and remained that way until 2004 when Fred Turner, who had worked alongside founder Ray Kroc, wanted it changed back.
After tracking down the original formula in the McDonald’s archives, Turner contacted the supplier who had helped develop the McDonald’s Special Sauce years ago, and the McDonald’s Special Sauce recipe was returned.