The Shamrock Shake is a milkshake made with vanilla soft-serve ice cream, artificially flavored minty green syrup and whipped topping. McDonald's debuted the first Shamrock Shake in 1970, and the cult classic has been returning to the menu around St. Patrick's Day each year since.

McDonald's popular Shamrock Shake typically comes back well ahead of spring, and this year is no exception. Some of the Chicago-based fast food giant's locations have already begun offering the sweet concoction. You just might be able to get your hands on one early -- if your local McDonald's has rolled it out.

McDonald’s fans, brace yourselves because the food chain is about to reintroduce its seasonal classic—the Shamrock Shake.