The whoopie pie, alternatively called a black moon, gob (term indigenous to the Pittsburgh region), black-and-white, bob, or "BFO" for Big Fat Oreo (also recorded as "Devil Dogs" and "Twins" in 1835), is an American baked product that may be considered either a cookie, pie, sandwich, or cake. It is made of two round mound-shaped pieces of usually chocolate cake, or sometimes pumpkin, gingerbread or other flavored cakes, with a sweet, creamy filling or frosting sandwiched between them. History While considered a New England classic and a Pennsylvania Amish tradition, they are increasingly sold throughout the United States. The whoopie pie is the official state treat of Maine (not to be confused with the official state dessert, which is blueberry pie). Gob [the term indigenous to the Pittsburgh region] has been trademarked by the Dutch Maid Bakery in Johnstown. The owner, Tim Yost, bought the rights to the name and the process in 1980. The world's largest whoopie pie was created in South Portland, Maine, on March 26, 2011, weighing in at . Pieces of the giant whoopie pie were sold and the money was used to send Maine-made whoopie pies to soldiers serving overseas. The previous record holder, from Pennsylvania, weighed . The town of Dover-Foxcroft, in Piscataquis County, Maine, has hosted the Maine Whoopie Pie Festival since 2009. In 2014, more than 7,500 people attended the festival. The 2013 festival had eight different whoopie pie vendors in attendance. Bakers from across Maine compete for top whoopie pie in a number of categories. Origin controversy Pennsylvania, Maine, Massachusetts, Virginia and New Hampshire all claim to be the birthplace of the whoopie pie. The Pennsylvania Dutch Convention & Visitors Bureau notes that the whoopie pie recipe comes from the area's Amish and Pennsylvania German culture—origins that are unlikely to leave an official paper trail—and has been handed down through generations. In addition the community is very insular and do not adopt external ideas. Therefore the whoopie pie is an internal invention of the Amish community. Labadie's Bakery in Lewiston, Maine has been making the confection since 1925. The now-defunct Berwick Cake Company of Roxbury, Massachusetts was selling "Whoopee Pies" as early as the 1920s, but officially branded the Whoopee Pie in 1928 to great success. Various claims suggest that the whoopie pie originated in Massachusetts and spread both north and south, or that German immigrants in Pennsylvania brought the predecessor