A seasonal favorite will be back on the menu next week. Here's what we know about McDonald's Shamrock Shake and Oreo Shamrock McFlurry.

Saint Patrick’s Day is approaching, which means one thing to McDonald’s fans: The return of the Shamrock Shake.

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.

One of the most recognizable holiday treats at McDonald's is making its return, along with one of Grimace's relatives.

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 signature Shamrock Shake is set to return for limited time this year. The shake will be sold at participating McDonald’s restaurants nationwide starting Monday, Feb. 10. The Shamrock Shake is made with vanilla soft serve blended with McDonald’s minty Shamrock Shake syrup and topped with whipped cream.

McDonald’s is bringing back Uncle O’Grimacey, the long-lost green mascot who originally promoted the Shamrock Shake in the 1970s. First introduced as Grimace’s Irish uncle, he disappeared from McDonald’s marketing but is now making a comeback to celebrate the Shamrock Shake’s return on February 10,