Are they mint flavored? Or, is your mind playing a trick on you with the green coloring? And they're just vanilla shakes? We had our two Shamrock Shake experts weigh in with this seasonal treat. Although a quick, passing everyday moment...I LOVE that we are bonded to our kids through this shared experience: we had Shamrock Shakes as kids. And they do, too. The last time I posted about Shamrock Shakes was ten years ago when little tiny Eloise was enjoying her first ever . Time flies.