It's soon to be Shamrock Shake season. McDonald's Shamrock Shake, a milkshake made with vanilla soft-serve ice cream, artificially-flavored minty green syrup and whipped topping, will return to restaurants on Monday,

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.