cheeseburger soup recipe

Ingredients**: - 1 lb ground beef - 1 small onion, diced - 2 cloves garlic, minced - 1 cup carrots, diced - 3 celery stalks, diced - 3 cups potatoes, peeled and diced - 4 cups chicken broth - 1/4 cup all-purpose flour - 3 cups milk - 2 cups shredded cheddar cheese - Salt and pepper to taste - 1/4 cup sour cream - 1 tbsp Worcestershire sauce (optional) - 2 tbsp butter