You might be wondering what could possible not be vegan about marshmallows and cereal. There are two non-vegan ingredients in the traditional version of this recipe, one of which isn't even vegetarian: butter and marshmallows. Butter makes sense (and is easy to substitute by using vegan butter!), but you might be wondering why marshmallows aren't vegan. Marshmallows are made with gelatin, which is ground up bones and ligaments, usually from cows. Kosher gelatin usually uses the ground up bones and ligaments from fish. No, thank you! Vegan marshmallows used to be hard to find. Now, though, they're widely available and work as well as the animal kind in this recipe! I used Dandies for this recipe, but any vegan marshmallows will do the trick. Trader Joe's marshmallows are also vegan, and they're very affordable. TJ's marshmallows are a seasonal item, so when you do see them, stock up!