why did vanessa say Cheese and Crackers...
It's an attempt to create an "Oh, my gravy!" type catch phrase for 2012. They don't deliver the line nearly as well as Jet and Cord did though and it just came off as odd.
Not quite. Cheese and Crackers is a euphemism for "Jesus Christ".
This subject had some kind of perverse interest for me. Here is a list of euphemisms for "Jesus Christ (Peach is right about cheese and crackers):
THE JEEPERS CREEPERS LIST
Euphemisms for Jesus Christ
Expressions of surprise, disbelief, strong emotion
Cheese and crackers, got all muddy (=Jesus Christ, God almighty) Cheese and rice and all his apostles
cheese 'n' crackers
cheese 'n' quackers
Cheez Whiz (tm)
Gee willikers (whilikers, etc)
Geez Louise, Jeez Louise
Jesus Frog! ( New Zealand)
Jesus H. Christ (or Aitch or Age or Henry)
Jesus Mahogany Christ
Jesus wept (the shortest Bible verse)
Jiminetty, jiminently (var. geeminently)
Jinkies (said on TV cartoon "Scooby-doo")
Sheesh (Origin uncertain. Expresses exasperated disbelief) Yiminy, or Yumpin' Yiminy (stereotypical Swedish)
Euphemisms for & expressions with Christ, only
Chrissakes (stronger than the others), fer Chrissakes Christ on a bicycle
Christ on a bike
Criminy, criminey, crimony
for crying in the sink
for crying out loud
SOME NOTES ON USE AND ORIGINS
Jesus (H.) Christ is often on a:
or roller skates.
Judas Priest is typically found on a pony.
'I had a great uncle who often used the expression, "He was so cheap he wouldn't pay a dime to see Christ on a bicycle."'