Okay, this is bizarre. Bob and I were just re-reading a Mad mag this morning on his favorite Star Wars topic, and now I see this thread. No song parodies in that issue, but several of the parodies already mentioned in this thread came from a single issue that had songs about food: Ground Round (Downtown), the Chinese Restaurant Song (Oh, What a Beautiful Morning), Chopped Liver (Moon River), and Hello, Wine Lovers (Hello, Young Lovers), the last of which I didn't memorize because I was fuzzy on the tune. It also had The Sundae With the Nuts on the Top (The Surry etc.) and probably a couple of others.

Ev'ry day is really a fun day
When I eat a big, gooey sundae
When I eat a big, gooey sundae
With the nuts on top

(2nd verse, I forgot)

(bridge, I can only remember the last line:)
Which may be why I'm feeling icky

Tho' my figure's taking a beating
From this glob of glue that I'm eating
When I'm through, you'll find me repeating
'Cause I just can't stop
Eating all those gooey sundaes
With the nuts on the top

There's also another version of The Raven, called The Rating, and I only remember the final punch line:

Quoth the Rating, Gary Moore.

Surely the entire Mad run is archived somewhere! More, more.