There's only so much you can do with burgers to Halloween-ify them, but aside from cutting the cheese into jack-o-lanterns or using a pumpkin for buns, you can also shape the patties into hands and put ketchup on top as "blood." Check out the recipe from the book Hungry Halloween at Hungry Happenings.
About the author: Robyn Lee is the editor of A Hamburger Today and takes many of the photos for Serious Eats. She'll also doodle cute stuff when necessary. Read more from Robyn at her personal food blog, The Girl Who Ate Everything.