Heat 2 tablespoons olive oil in large pot over medium-high heat. Add chopped onion and diced jalapeño. Cook for 5 minutes until onion softens and turns translucent.
Add minced garlic, chili powder, and oregano. Stir constantly for 1 minute to bloom spices in hot oil.
Pour in chicken broth and add chicken breasts. Season with salt and pepper. Bring to boil, reduce heat, cover, and simmer 12-15 minutes until chicken reaches 165°F.
Transfer cooked chicken to plate, let rest 2 minutes, then shred with two forks. Return shredded chicken to pot.
Stir in sour cream, shredded cheese, cilantro, corn, and lime juice. Mix until cheese melts completely and chili is creamy.
Whisk cornstarch and water until smooth. Slowly pour into pot while stirring constantly.
Let chili simmer uncovered 10 minutes, stirring occasionally, until thickened. Taste and adjust seasoning.
Ladle into bowls and top with bacon, cotija cheese, tortilla strips, avocado, and lime wedges.
Notes
Use rotisserie chicken for faster prep. Add 3 cups shredded chicken when recipe calls for cooked chicken.
Bloom spices in hot oil for deeper flavor, but don’t burn the garlic.
Add sour cream off heat if concerned about curdling, then return to low heat.
This recipe is naturally gluten-free when using gluten-free tortilla strips.