Despite its name, tiger nut is actually a tuber. Often soaked in warm water before eating, tiger nut has a sweet, nutty flavor. In Spain they are used to make horchata, a milky drink. This can make a good milk alternative for those who are lactose intolerant or vegan, although it's not a source of protein or calcium. Tiger nuts are high in fiber, particularly resistant starch, which may aid in your digestive health.