Whoopie Pie

The whoopie pie (alternatively called a black moon, gob, black-and-white, bob, or "BFO" for Big Fat Oreo) is an American baked good that may be considered either a cookie, pie, or cake. It is made of two round mound-shaped pieces of chocolate cake, or sometimes pumpkin or gingerbread cake, with a sweet, creamy filling or frosting sandwiched between them.