A Shamrock Shake is a mint flavored green milkshake. It was made famous by McDonald's restaurants and is on the menu around St. Patrick's Day.u003cbr/u003eu003cbr/u003eThe dairy-based shake is made from vanilla soft-serve ice cream, flavored with mint, and topped with whipped cream and a cherry. u003cbr/u003eu003cbr/u003eSide note: this shake was originally flavored with lemon/lime sherbet, but now is mint flavored.