History of Marshmallow Fluff - Part One: "On May 14, 1920, a small article appeared in the Lynn, Massachusetts, Daily Evening Item announcing that two young men, H. Allen Durkee and Fred L. Mower, both graduates of Swampscott High and veterans of the United States Infantry in World War I, had formed a partnership in the manufacture of Marshmallow Fluff. The actual date that they started working together is hard to pin down, because they had been making candies together before they started making Fluff. The company numbered two men in those days, and they started out cooking their confections in the kitchen at night and selling them door to door in the daytime."
I haven't seen this in the local stores for a long time though there are others brands. We used to have to go to Walmart to get the one without extra coloring agents because of a cousin with allergies.
The best thing in the world is Fluff, Nutella, raspberry jam and honey (to balance the sweetness) but I had it in Europe when I was on a bike all the time.