According to McDonald’s, the Shamrock Shake was invented in 1967 by a McDonald’s owner/operator based in Connecticut named Hal Rosen. The mint shake, of course intended to celebrate St. Patrick’s Day, ...
Top of the morning to 'ya. It's soon to be Shamrock Shake season. McDonald's Shamrock Shake, a milkshake made with vanilla soft-serve ice cream, artificially-flavored minty green syrup and whipped ...