McDonald’s iconic “Big Mac: Two All-Beef Patties…” campaign became one of the most memorable fast-food jingles of the 1970s and continued to resonate well into the ’80s. The jingle listed every ingredient of the Big Mac in a catchy, rapid-fire rhythm that made customers want to sing along. It helped cement the Big Mac as McDonald’s flagship burger and turned the ingredients list itself into pop culture. The campaign boosted brand recognition and set a new standard for jingles as marketing tools.