Mint and chocolate lovers rejoice! McDonald’s is adding four new “Chocolate Shamrock Shakes” to its  menu. In addition to the annually offered vanilla and mint “Shamrock Shake,” the fast-food chain will also be blending a new Chocolate Shamrock Shake, a Shamrock Chocolate Chip Frappe, a Shamrock Hot Chocolate and a Shamrock Mocha, reported Brand Eating. If the Chocolate Shamrock Shake sounds familiar, it’s because it was on the McDonald’s “secret menu”—that is, items available to those “in the know”—for a number of years. Well, somethings are too good not to share, and we’ll thank our lucky shamrocks, they decided to add these to the seasonal offerings. Original Shamrock Shake – Vanilla soft serve and mint-flavored Shamrock Shake syrup served with whipped topping and a maraschino cherry. New this year is a sprinkling of green sugar crystals—because if you’re counting, by this point, why worry about a few extra calories. Chocolate…