In about a week, Shamrock Shakes will start disappearing from McDonald's again.  So if you want them year-round, here's how. released a very simple recipe for replicating the Shamrock Shake at home.  Just dump these four ingredients into a blender and mix 'em up . . .

-Three cups of a high-quality vanilla ice cream.

-One-and-three-quarters cups of 1% milk.

-Half a teaspoon of peppermint extract.

-Green food coloring.