Grimace, McDonald’s large purple character, made his way back in the media in 2023 with the viral Grimace Shake. Coming out of retirement after 40 years for St. Patrick’s Day is Grimace’s Irish Uncle, O’Grimacey. He’s back to promote McDonald’s Shamrock Shake for its 55th anniversary in addition to the 50th anniversary of Ronald McDonald House Charities which opened as a result of proceeds from this festive green shake! Keep reading to learn more about Grimace’s Uncle, O’Grimacey, the history of the Shamrock Shake, and how to make your own at home! Continue reading Return of Uncle O’Grimacey and the Shamrock Shake