Could there be any more enjoyable junk food than Marshmallow Fluff? We strongly suspect not. Marshmallow Fluff is delicious as part of a whoopie pie, in a fluffernutter, or just spooned out of the tub. Aside from its wonderful, wonderful taste, Marshmallow Fluff is notable and awesome (and also, notably awesome) because it was invented in Somerville! In 1917, a visionary named Archibald Query (which is, by the way, a tremendous name) started peddling the stuff door to door. Union Square is having a massive What the Fluff?! Festival this weekend to celebrate the delightful creme’s 90th birthday. We’d like to extend our own happy returns with this excellent instructional video on the making of the perfect fluffernutter. Happy birthday, Marshmallow Fluff!