I think the majority of fast foods, low prep, and junk foods could easily be categorized as autist fodder.
In terms of the occasional treat they're not necessarily exceptional in themselves, but when wielded in the hands of a true autist who is incapable of making good food decisions coupled with a low level of self control, will lead to an ever expanding waistline, and a generally unhealthy appearance.
Now something that isn't necessarily autist, but definitely Carny tier food is an item in the UK called Hunger Breaks All Day Breakfast. A sumptuous feast of sausages, pork and egg nuggets, beans, bacon, and mushrooms in a economically sized tin.
I don't get who would ever eat this stuff except those who had completely given up on life.