For a smoother soup, use an immersion blender to partially blend the soup after cooking. Soaking the black beans for a few hours before cooking can reduce cooking time and improve digestibility. Adjust the amount of chili powder and cumin to suit your taste. Consider adding a pinch of smoked paprika for extra depth of flavor. Garnish with your favorite toppings like sour cream, avocado, cilantro, or a squeeze of lime juice.