Chicken Chili recipes

Name: Chicken Chili recipes
Ingredients: 2 large yellow onions, medium dice; 2 Tbl butter; 3 cloves garlic, finely minced; 2 red bell peppers, cored, seeded, and large-diced; 2 yellow bell peppers, cored, seeded, and large-diced; 1 teaspoon chili powder; 1 1/2 teaspoon ground cumin; 1/4 teaspoon dried red pepper flakes, or to taste; 1/4 teaspoon cayenne pepper, or to taste; 2 teaspoons kosher salt; 2 (28-ounce) cans diced tomatoes; 2 15 oz cans black beans; 1/4 cup minced cilantro stems; 3 cups chicken cooked, shredded; sour cream; cilantro