Looks like the episode where Homer sells his soul. The blank should be dreams. After this he tries to grab a donut, but Lenny and Carl already ate them (and whar they couldn't they threw at Abe)

So the Treehouse of Horror 4, if I'm not mistaken (I hope not, one of my favourites)

(First time playing, did I do it right? I couldn't find more information about the rules)

Edit: he sells his soul for a donut. Turns out Ned is the Devil. Homer decides to leave the last bit of the donut to outsmart the Devil, but eventually he eats it and then they have a trial whether Devil owns Homer's soul or not suggested by Lisa (it's a reference, I believe, to some American short story about Devil and an American in court over the man's soul). Marge eventually proves she "owns" Homer's soul and so Devil turns Homer's head into a giant donut.

I am adding this because I am not sure how deep into the plot I'm supposed to go when describing an episode lol