this is a really neat idea! i would definitely watch youtube videos about homestuck recipes *-*

cake, pumpkins, grub sauce, mind honey, orange creamsicle, peanuts, maybe something involving gushers or apple juice? i found this tiermaker ( https://tiermaker.com/create/homestuck-food-tierlist-1561333 ) that has screenshots of some different foods shown in the comic that might give you some inspiration!