CHEESEBURGER SOUP

what you need :

½ pound ground beef (use 1 pound)
¾ cup chopped onion
¾ cup shredded carrots
¾ cup diced celery
1 teaspoon dried basil
1 teaspoon dried parsley flakes
4 tablespoons butter, divided
3 cups chicken broth
4 cups peeled and diced potatoes
¼ cup all purpose flour