Though it sounds vegetarian, French onion soup is traditionally made with beef broth.
Many fat-free varieties contain gelatin—an ingredient derived from various animal body parts—to help retain its texture.
Figs are arguably non-vegetarian as they contain at least one dead female wasp inside. It's a natural part of the fruit's pollination.
Marshmallows also contain gelatin. But gelatin-free varieties are available for those unwilling to forego s'mores.
Some contain lard to make it more buttery, so be sure to ask your restaurant and check the package.
Fries are by definition vegetarian, but many restaurants use animal fat to fry them. McDonald's is just one example, and they've even been sued over it.
Many brands of beer and wine, particularly British ones, use isinglass, a gelatin derived from a certain freshwater fish.
Most recipes, though not all, of baked beans call for bacon or ham hock. Heinz Beanz is both vegetarian and vegan, for example.
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