Traditionally you soak red beans in water overnight. Soaking red beans or any beans allows you to remove the acidic nature of beans which causes gas or bloating. However, the option is solely yours for this recipe because we're using an instant pot (pressure cooker). You do not need to soak the beans overnight. Put the dry red beans into the pressure cooker with enough water to cover them, bring them back up to pressure, and then cook for 90 minutes.