Walnuts are round, single-seeded stone fruits known for their rich, buttery crunch and distinctively wrinkled, brain-like shape. Encased in a hard outer shell, the edible kernels are widely enjoyed raw or toasted as a snack, baked into breads and pastries, or tossed into salads, pestos, and savory grain dishes. Packed with plant-based omega-3 fatty acids, high levels of antioxidants, and healthy fats, walnuts are particularly celebrated for supporting brain function, promoting cardiovascular health, and reducing inflammation.