McDonald's had a smash hit when the double-decker Big Mac sandwich made its debut at a Uniontown, Pa., franchise in 1967.
The 45-cent burger went national a year later, and its catchy "two all-beef patties ..." jingle in 1974 only added to the sandwich's popularity. Today, an estimated 550 million Big Macs are sold each year in the U.S.
So you might wonder: Why mess with success?
The answer, of course, is that menu innovation brings in new customers, especially when it's a limited-time offer that puts a creative spin on an iconic product.
This month, the burger giant debuted the Chicken Big Mac, and if the number of people asking for it at my local McDonald's is any indication, they've got another winner (and social media darling) on their hands.