Kidney bean is a common vegetable, which can be eaten after being cooked. Boiling kidney beans takes about 15-20 minutes. Cooked kidney beans should be soft and chewy, but not too rotten. When cooking kidney beans, you can control the cooking time according to your personal taste and preference. If you like a softer taste, you can extend the cooking time. If you like to maintain a certain taste and chewiness, you can appropriately reduce the cooking time.