Chicken Rice Soup

Name: Chicken Rice Soup
Cuisine: American, World Cuisine
Ingredients: Cooked and shredded chicken, thighs; 2-3 C cooked rice, brown or wild; 3 T butter; 3 cloves garlic, minced; 1 C celery, chopped; 1 C carrots, chopped; 1 C onion, red, white, or yellow; 3 T flour; 2 C chicken bone broth; 2 C milk, whole or can use regular; 2 C mushrooms, sliced; Salt; Pepper