A walnut is the edible seed of the walnut tree. It is encased in a hard shell inside a green outer husk, and when removed, reveals a brain-shaped nut with a rich, slightly bitter flavor. Walnuts are widely consumed as a snack, used in cooking and baking, and are valued for their high content of healthy fats—especially omega-3 fatty acids—along with protein, fiber, and antioxidants. They are also linked to various health benefits, including improved heart.

Fun fact about Walnuts is that they look like little brains and they're actually good for brain health!