well it's also true for cornflakes. They have a weird creepy history because the creator of them was against things like masturbation, and he suggested eating cornflakes would help.
But I believe OP was probably referring to a simpsons episode. The flanders are playing pictionary where Flanders draws cornstarch on the poster, and his wife gets the answer correct. I wasn't alive when this episode came out but probably the writers were making a joke about cornflakes by using cornstarch, but that's jst my guess.
ex cedda
... Don't take the bait, don't take the bait, don't take the bait.
ex all
Damn it! You suck for doing this to us. ๐