cheeseburger soup recipe

**Ingredients:** - 1 lb ground beef - 1 cup diced onion - 1 cup diced celery - 1 cup shredded carrots - 2 cloves garlic, minced - 4 cups chicken broth - 4 cups peeled and diced potatoes - 2 cups shredded cheddar cheese - 1 1/2 cups whole milk - 1/4 cup all-purpose flour - 1/4 cup sour cream - Salt and pepper to taste - 2 tablespoons butter - 1 tablespoon olive oil