Shamrock Shake

Shamrock Shake

A customer's Shamrock Shake sitting on a table at McDonald's
Owner	McDonald's
Country	United States
Introduced	1970

The Shamrock Shake is a seasonal green-dyed mint-flavored milkshake dessert sold at McDonald's during March to celebrate St. Patrick's Day.

The Shamrock Shake was first introduced in 1970. Rogers Merchandising in Chicago created the shake. Initially, the shake was lemon/lime flavored with vanilla ice cream, lemon/lime sherbet, and vanilla syrup. By 1973, the shake was merely a green colored vanilla shake, eliminating the lemon/lime sherbet. It is now mint flavored.

Shamrock Shakes are sold at all U.S. and select Canadian stores during the months of February and March, as well as in Ireland.

During the 1980s, McDonald’s used the Uncle O'Grimacey character to market Shamrock Shakes, which was a green version of Grimace who came to visit in March. McDonald's has since phased out that character from their mascot lineup.

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.

In 2017 McDonald's introduced a few variants of the Shamrock Shake including the Shamrock Chocolate Shake, the Shamrock Chocolate Chip Frappé, the Shamrock Mocha, and the Shamrock Hot Chocolate.