8 Tablespoons butter
2 cloves garlic
1/2 cup all-purpose flour
4 cups low-sodium chicken broth
4 teaspoons chili powder
1 Tablespoon ground cumin
1 Tablespoons garlic powder
1 teaspoon salt
freshly ground black pepper to taste
1 1/2 lbs boneless skinless chicken breasts
1 10 oz can diced tomatoes with green chiles
1 medium jalapeño minced (seeds and membranes left intact for spicy, removed for mild)
2 cups 8 oz shredded sharp cheddar, Mexican blend or Colby Jack cheese, plus more for serving
Tortilla chips for serving
Chopped fresh cilantro for serving, optional