There are two types of horror fans: those that will want to make these immediately and those that will gag immediately. On second thought, I propose a third: those that will want to make these because they gagged.
We spotted these on the excellent Street Anatomy Blog. The maker of these fine culinary horrors has a lot of info in the comments of her Flickr set, including links to the brain mold used. There's nothing like the thought of eating brains to get me ready for the weekend!