Might be a New England thing. Made by hostess. Kind of a square whoopsie pie: two pieces of chocolate cake with cream inside.
Suzy Q -
TV movie.
http://www.imdb.com/title/tt0117794/
1960s song by CCR.
https://www.youtube.com/watch?v=1mxaA-bJ35s
a brand of snack cake formerly produced and distributed by Hostess Brands and currently owned by private equity firms Apollo Global Management and Metropoulos & Co. The oblong sandwich, of devil’s food cake with white crème filling or banana-flavored, was invented in 1961 and named after the daughter of Continental Baking Company Vice President Cliff Isaacson.
http://en.wikipedia.org/wiki/Suzy_Q
https://www.facebook.com/HostessSuzyQs