Whoopie pie

black moon, black and white, bob, BFO, big fat oreo, gob

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.

Source: Wikipedia

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