Part 3/7:
Mustard dates back as far as 2,500 years, emerging from the ancient Greeks and Romans, who initially used it for medicinal purposes before embracing its flavor. The bright yellow variety known today was introduced by the RT French company in the early 20th century.
Fast Food and the Birth of Secret Sauces
The most renowned secret sauce in fast food is arguably McDonald's Special Sauce, introduced with the Big Mac in 1964. However, the concepts of "secret sauce" and "special sauce" much predate McDonald's fame, stemming as far back as the 19th century. Initial examples were found in restaurants like the Pier 40 Tavern in Honolulu during the 1940s.