Successful fast food franchises are defined by their "money" items. For Burger King, it's the Whopper. For Taco Bell, it's diarrhea. Just kidding, Taco Bell is amazing and I love everything on their menu.
And although McDonald's might be a great spot for coffee, and they're trying to revamp their burgers for hungry customers all over the globe, there's one menu item that's undeniably been their tried-and-true profit machine since the beginning.