Overview
- Sales begin nationwide Tuesday, Feb. 17, as part of McDonald’s annual “Shamrock Season.”
- The shake blends vanilla soft serve with mint-flavored Shamrock syrup and whipped topping, while the McFlurry adds crushed OREO cookie pieces.
- McDonald’s labeled both items limited-time offerings with no announced end date, and availability can vary by location.
- Nutrition details from McDonald’s list 540 calories for a medium Shamrock Shake and 800 for a large, while a regular OREO Shamrock McFlurry has 460.
- The Shamrock Shake debuted in 1970, and the OREO variant joined in 2020 as a recurring seasonal tie-in to St. Patrick’s Day.