Walnut meal, also known as ground walnuts, is popular for its heavenly texture in cakes and cookies. Nutrition Tips: High in fiber, vitamin E, protein and nutritious unsaturated fat, walnuts make a great snack. Thanks to its high number of antioxidants, walnuts provide us many unknown benefits. They are also a rich source of minerals like manganese, copper, potassium, calcium, iron, zinc, and selenium.