Every region of the U.S. has a dish that's a local pride and joy, but people who didn't grow up in the area might find it a bit unusual. One such dish is the fluffernutter sandwich, AKA peanut butter and marshmallow fluff, a nostalgic treat that some Americans forget about once they grow up, but not so for the residents of one particular state.

The fluffernutter is an enduring Massachusetts icon that is credited to Emma Curtis, Paul Revere’s great-great-great-granddaughter. Emma and her brother Amory ran the Snowflake Marshmallow Creme company, and Emma printed recipes on their jar labels to make their brand stand out, one of which was the fluffernutter.

Curtis named her version the Liberty Sandwich, and the "fluffernutter" name was created in the 1960s by a PR agency hired by Marshmallow Fluff, the now-ubiquitous marshmallow creme product. The sandwich was popularized by its catchy advertising jingle, with a TV commercial even showing viewers exactly how to make the sandwich.