Total Preparation time: 40 minutes
Accompaniments: salsa, chopped Hass avocado, grated cheese, and shredded lettuce
Melt the butter in a large saucepan over medium-low heat. Add the onion and cook, stirring occasionally, until softened, about 8 minutes. Add the garlic and cook 1 minute. Stir in the flour, chili powder, cumin, and cayenne to taste and cook 2 minutes longer. Gradually whisk in the broth and wine; bring to a boil and simmer 3 minutes.
Add the chicken and simmer gently until the chicken is just cooked through, about 8 minutes. Add the beans and sour cream and cook 15 minutes or until nicely thickened. Season with salt and pepper to taste. Serve with the accompaniments.