Heat the large pot over medium heat and add a splash of oil. Sauté the chopped onion until it becomes translucent and fragrant, about 5 minutes.
Add the minced garlic and cook for another 1 minute until it releases a warm aroma.
Pour in the chicken broth and bring it to a gentle simmer, scraping the bottom of the pot to loosen any browned bits.
Stir in the cumin, smoked paprika, and chili powder, allowing their flavors to meld into the broth for about 1 minute.
Add the shredded cooked chicken and white beans to the broth, stirring gently to combine all ingredients evenly.
Reduce the heat to low and let the chili simmer uncovered for about 10 minutes, allowing the flavors to develop and the soup to thicken slightly.
Stir in the sour cream to add richness and creaminess, blending it into the chili until heated through but not boiling.
Taste the chili and season with salt and pepper as needed, adjusting the seasoning to your preference.
Serve hot, garnished with fresh cilantro or additional toppings, and enjoy its comforting, velvety texture.