Advertisement'What The Fluff?' Celebrates A Century Of Peanut Butter's Marshmallow FriendSeptember 30, 2017Carolyn BeansfacebookEmailFans enjoy a tasty treat made with Fluff at the 12th annual What the Fluff? festival in Somerville, Mass., on Sept. 23. The festival celebrates the 100th anniversary of Fluff, invented in Somerville in 1917 by Archibald Query. (Carolyn Beans)