The edible seed of the macadamia tree, native to Australia and now cultivated in Hawaii, South Africa, and other warm regions. Macadamia nuts are prized for their rich, buttery flavour and creamy texture, a result of their very high monounsaturated fat content. They are eaten roasted as a snack, used in confectionery such as chocolate-coated macadamias and cookies, and pressed for a delicate culinary oil. Nutritionally they provide monounsaturated fats, thiamine, manganese, and fibre, though their energy density demands portion awareness. Macadamias are toxic to dogs, so pet owners must keep them out of reach.