Mallomars are only sold from October to March, primarily in the New York State region. So you may not know about these beloved, gooey, s'more-like cookies. They've got a marshmallow center, a graham cracker crust, and a crispy dark chocolate coating. Way back in 1913, when Nabisco first began making them in New Jersey, they were delivered without benefit of refrigeration. So during the warmer months the chocolate would turn into a melted mess.
But nowadays don't they keep their trucks adequately chilled? Why do devoted fans have to yearn for their return in October? Who knows. It certainly adds to their mystique. Perhaps Mallomars just like to play hard to get.