White Kidney Select Beans It is a dry legume of national origin, grown in Castilla y León. White kidney beans are among the most prized and exquisite in Spanish gastronomy. They are creamy white in color, with a very smooth skin, oblong and elongated in shape. Once cooked, these White Kidney Beans retain their shape very well. They stand out for their high content of proteins, carbohydrates, fiber and iron.