Whoopie pie
The whoopie pie, alternatively called a black moon, gob (Pittsburgh area), black-and-white, or bob, is an American baked confection that is considered as either a cookie, pie, or cake. A Whoopie Pie is composed of two round, mound-shaped pieces of cake (traditionally chocolate cake, although sometimes available with pumpkin, gingerbread, or other flavored cake), sandwiching a sweet, fluffy and creamy filling (somewhat like a marshmallow creme-based buttercream).