Kidney beans cooked by boiling are 67% water, 23% carbohydrates, 9% protein, and contain negligible fat (table). In a 100 gram reference amount, cooked kidney beans provide 530 kJ (127 kcal), and are a rich source (20% or more of the Daily Value, DV) of protein, folate (33% DV), iron (22% DV), and phosphorus (20% DV), with moderate amounts (10–19% DV) of thiamin, copper, magnesium, and zinc (11–14% DV).
Red kidney beans are commonly used in chili con carne and are used in the cuisine of India, where the beans are known as rajma. Red kidney beans are used in southern Louisiana for the classic Monday Creole dish of red beans and rice. The smaller, darker red beans are also used, particularly in Louisiana families with a recent Caribbean heritage. Small kidney beans used in La Rioja, Spain, are called caparrones. In the Netherlands and Indonesia, kidney beans are usually served as soup called brenebon.^[1] In the Levant, a common dish consisting of kidney bean stew usually served with rice is known as fasoulia. To make bean paste, kidney beans are generally prepared from dried beans and boiling until they are soft, at which point the dark red beans are pulverized into a dry paste.