A fluffernutter is a sandwich consisting of two slices of bread, one slice smeared with peanut butter, and the other with marshmallow fluff (a thick marshmallow cream spread). When the two slices are combined, the sandwich is ready. It is a school cafeteria staple and an extremely popular sandwich on its own throughout New England.

Marshmallow Fluff is actually a brand, invented in 1917 by entrepreneur Archibald Query, who sold it to candy makers H. Allen Durkee and Fred Mower. As it was invented in Massachusetts, it had also been proposed as the official state sandwich. Fluff is so popular that it even has its own day - National Fluffernutter Day, celebrated on October 8.