In “The Enthusiasts,” (season 6, episode 5) we visit Somerville, Massachusetts, where the What the Fluff? Festival celebrates a tasty icon of many New Englanders’ childhoods: Marshmallow Fluff. Then we head to the Durkee-Mower factory in Lynn, Massachusetts, to see how the sweet spreadable confection has been made using the same recipe for the past century. Love Fluff? Here are some of our favorite recipes featuring the sweet New England staple.