Quoting from:
http://www.lavasurfer.com/cereal-fictional.html

Calvin of Calvin and Hobbes fame has been
known to eat Chocolate Frosted Sugar
Bombs which Calvin says are "tasty,
lip-smacking, crunchy-on-the-outside,
chewy-on-the-inside, and they don't have
a single natural ingredient or essential vitamin
to get in the way of that rich, fudgy taste."
Hobbes says the cereal makes his heart skip
and likens this cereal to "eating a bowl of
milk duds".