Walnuts are hard-shelled nuts that belong to the Juglandaceae family. They have a wrinkled, hard outer shell that encases a single, edible seed. The seed itself consists of two bumpy, lobed halves, which are commonly referred to as walnut kernels. These kernels have a rich, buttery flavor and a slightly bitter taste. Walnuts are often consumed as a snack or used in various culinary applications, such as baking, cooking, and as a topping for salads or desserts. They are also prized for their nutritional value, being high in omega-3 fatty acids, antioxidants, vitamins, and minerals.