Well, I guess you already mixed the batter, so... [Sans can bring himself to heat up a pan and put some of it in a pan to eat pancakes. He guesses. If there's any passive aggression in the way Papyrus checks to make sure no mysterious midnight syrup thefts have happened, Sans seems to be ignoring it entirely. There's plenty of things Sans feels guilty about doing and not doing, but taking the knife is nowhere on that list.]
no subject