Before long, McDonald’s took the idea and spread it around to other McDonald’s across the U.S. By the time McDonald’s founder Ray Kroc wrote his memoir Grinding It Out a decade later, the Shamrock ...

McDonald’s is bringing back Uncle O’Grimacey, the long-lost green mascot who originally promoted the Shamrock Shake in the 1970s. First introduced as Grimace’s Irish uncle, he disappeared from ...