Q. Where was Marshmallow Fluff invented?
A. Marshmallow Fluff was invented in Sommerville, Massachusetts by Archibald Query around 1915. He made batches of it in his kitchen and sold it door to door until wartime shortages forced him to stop. After the war he sold the recipe to H. Allen Durkee and Fred L. Mower for five hundred dollars. The product started to be manufactured from their factory (Durkee-Mower) in East Lynn in 1929.
Sources: The Oxford Encyclopedia of Food and Drink In America by Andrew F. Smith, 2004. And www.marshmallowfluff.com