walnut

Walnut is the edible seed of trees belonging to the genus Juglans, native to temperate regions of the Northern Hemisphere and cultivated worldwide. The most commercially important species is the English walnut (Juglans regia), also known as the Persian walnut, which produces large, round nuts with a hard tan shell and brain-like, pale kernel. Black walnuts (Juglans nigra), native to North America, have a darker shell and more intensely flavored, pungent kernel. Walnuts are characterized by their high oil content, resulting in a rich, slightly earthy flavor with subtle bitterness, and their distinctive wrinkled, chamber-like interior structure.

Walnuts are versatile ingredients used in both sweet and savory applications across global cuisines. They are commonly incorporated into baked goods, salads, grain dishes, and sauces—particularly in Mediterranean and Middle Eastern cooking, where walnut-based sauces such as muhammara and zhug are traditional. In European cuisine, walnuts appear in cakes, breads, and confections, while in Asian cuisines they feature in stir-fries and rice dishes. Walnuts may be eaten raw, toasted to intensify flavor, ground into flour or butter, or pressed for oil. Their natural bitterness pairs well with fruits, strong cheeses, and assertive spices.