The Shamrock Shakes are returning to McDonald's!

They're only here for a limited time every year, but to put you in the mood for St. Patrick's Day here in the second largest St. Patty's Day-city in America, they're here for the taking starting TODAY.

HACK: ask them to toss in some oreo pieces in there...it's SO GOOD.

560 calories with 78 grams of sugar