In a large soup pot, heat the olive oil on medium low heat.
Add diced onion and minced jalapeño to the pot. Cook until softened, about 4–5 minutes.
Stir in garlic and cook for another 30 seconds until fragrant.
Season chicken breasts or thighs with salt, garlic, and onion powder.
Add chicken, white beans, green chiles, corn, chicken broth, and spices.
Stir to combine and bring to a gentle simmer.
Cover and simmer for 20–25 minutes, or until chicken is fully cooked and tender.
Remove the chicken, shred with two forks, and return it to the pot.
Adjust consistency of chili with more chicken broth, heavy cream, and sour cream. Adjust salt and pepper to taste.
Top with sour cream dollop and fresh cilantro. Serve warm.