Question: are in and out buns vegan?
Answer: The fast food chain is offering changes to their existing food options to accommodate vegetarian and vegan customers. ... Grilled Cheese (VEGETARIAN OPTION): Burger bun, cheese, special sauce, lettuce, tomato, onion. $2.25 + tax. Veggie Burger (VEGAN OPTION): Burger bun, lettuce, tomato, onion.