This fluffy childhood favorite contains gelatin, which is made by prolonged boiling of skin, cartilage, and bones from animals. This means no s'mores or rice krispie treats. Fluffernutter sandwiches, on the other hand, get the green light since fluff is gelatin-free.
Other foods that contain gelatin are Jell-O, gummy worms, Starbursts, Altoids, and some brands of sour cream and chewing gum.
Source: Flickr User Cooking Gluten Free