They have an awesome mint-chocolate taste. Mint and chocolate is one of my favorite flavor combinations, and it should be one of yours, too!
They are ridiculously, supremely, stupidly easy to make. Can you crush cookies? Can you mash cookies and frosting together in a bowl? If you answered yes to both of these questions, you can make these truffles. (And if you are thinking these sound a bit like Oreo truffles, you're right. They're not made with Oreos or cream cheese, but the concept of cookie crumbs forming the truffle base is the same. And isn't that a concept we can all get behind?)
They allow you the opportunity to make many truly groan-worthy jokes about "patience, young grasshopper" while making and eating these cookies.
Even one of these reasons would be good enough for me, but three? What are you waiting for? Get thee a package of cookies and get to truffle making, young grasshopper! (Told you it was fun.)