The Shamrock Shake has turned into a classic St. Patrick's Day treat. McDonald's serves up this minty, seasonal shake every March, and it's a hit for its lively green color and smooth, minty flavor.

Milk can be substituted in a pinch. Are there different flavors of Shamrock Shakes?In the past, McDonald's has offered Shamrock Chocolate Chip Frappés and Chocolate Shamrock Shakes. To make the ...