1. Observe color: Cooked beans will become darker in color, usually turning dark green or dark green. Uncooked beans are lighter in color, usually light green or light green.
2, observe the texture: cooked beans tend to be soft, easy to bend, soft texture. Uncooked beans tend to be hard and not easy to bend.
3, auditory judgment: when cooking beans, you can judge whether the beans are cooked by the foam sound of water. If the foam sound is relatively stable, it means that the beans are not ripe; If the sound of bubbles is loud and accompanied by the sound of bubbles bursting, it means that the beans are ripe.
4, try one: the most direct way is to try a bean, if you find that the bean tastes soft and has no astringency, then the bean is cooked.