Modified Rapture

From the bottom of the inbox.  Whoopie pies:

• are more cake-like than cookie, and nothing like a pie;

• differ from gobs in that gobs are filled with butter cream, while whoopie pies are filled with marshmallow;

•  differ from moon pies in that moon pies are covered with chocolate.

See generally link; and cf. link, passim.  I couldn't find any whoopie pie songs, but there's this: