McDonald's cup featuring Uncle O'Grimacey.
The Shamrock Shake was first introduced in 1970. Rogers Merchandising in Chicago created the shake. James Byrne, the executive artist at the firm, used a family recipe for the shake. Shamrock Shakes are sold at all American and select Canadian stores during the months of February and March, as well as in Ireland.[dead link]
During the 1980s, McDonald’s used the Uncle O'Grimacey character to market Shamrock Shakes, but has since phased it out.
In 1980, McDonald's introduced the Shamrock Sundae which consisted of vanilla ice cream topped with a mint green Shamrock syrup. The product was discontinued after one year due to poor sales.
- Huguenin, Patrick (2007-03-16). "Shamrock Shake Shocker: It's Disappeared!". The New York Daily News. p. 46. Archived from the original on 2009-03-16. Retrieved 2009-04-07.
- "Ultimate Shamrock Shake Guide". Gluttoner. Retrieved 18 October 2012.
- Associated Press (2012-02-08). "McDonald's offers Shamrock Shake nationally". Asheville Citizen-Times. Retrieved 2012-02-08.
- McCafé Shamrock Shake official nutrition page
- Collection of Shamrock advertising videos and shake locator