Calvin and Hobbes by Bill Watterson for April 01, 1993
Transcript:
Calvin: Aaugh! The peanut butter is ruined! You're supposed to scoop one half straight down and then dig out the other side from the bottom, so part of the top remains undisturbed until the very end! Mom: What on earth for? Calvin: It's a ritual! You have to keep the top of the peanut butter smooth! Mom: Maybe you should make your own sandwiches. Calvin: If you can't control your peanut butter, you can't expect to control your life. Did you cut the bread diagonally?
From the position of the knife in panel 3, he did get his diagonal cut