And their house is right above the kitchen. I think at one point the books mention that Hufflepuff students are known to sneak into the kitchen at night and steal rolls and other food.

Edit: I would seriously like to read a book or series that was just the entire Harry Potter saga told from the point of view of a group of Hufflepuff students. It would just be a bunch of scenes of kids eating junkfood and trying to figure out how to get away with the fact that they forgot to do their homework, with periodic safety assemblies every so often when some Gryffindor kid gets his ass killed during some big civil war conflict that the Hufflepuff kids vaguely remember hearing about on the wizard news. (Sample dialogue: "Hey, didn't that Cedric dude used to live here? Where the hell has he been? I call dibs on his chocolate frogs!")