Kidney beans are commonly eaten in chili and come conveniently canned. They are a medium to large bean. Red and white kidney beans (which are also called cannellini beans) are the more common, but with some searching, you can also find purple kidney beans, black kidney beans, and even spotted kidney beans. Nutritional profile: Per 1 cup (cooked, salted, sweetened) â?? 215 kcal, 13.4 g of protein, 1.54 g fat, 37.1 g carbohydrates, 11 g fiber, 4.74 g sugar, 87 mg of calcium, 607 mg potassium, 758 mg sodium.