Beans and legumes are all about hydration and gentle heat - too hot and they split, too low and they stay chalky. Sous vide cooks them evenly so the skins stay intact while the centers turn creamy, which is ideal for soups, salads, and meal prep. Unlike stovetop methods where beans at the bottom scorch while the ones at the top float above the waterline, the sealed bag ensures every bean gets the same temperature for the same duration. Dried beans should always be soaked overnight before sous vide cooking. The soak hydrates the skins so they expand gradually instead of bursting, and it cuts cook time by several hours. At 194°F (90°C), most beans reach the al dente stage in 4–6 h and the fully-soft stage by 8–10 h. Lentils cook faster (2–4 h) because they are smaller and thinner-skinned. This guide focuses on timing and texture targets so you can dial in anything from al dente lentils to spoon-soft chickpeas, with seasoning and finishing ideas for every doneness.