Homemade Mac and Cheese Casserole

Name: Homemade Mac and Cheese Casserole
Prep time: 20 min
Cook time: 25 min
Total time: 45 min
Cuisine: American
Ingredients: 12 ounces elbow macaroni; ¼ cup butter; ¼ cup all-purpose flour; 1 ½ cups milk; 1 cup half and half (or light cream); ½ teaspoon dry mustard powder; 1 teaspoon onion powder; ½ teaspoon salt (or to taste); ¼ teaspoon black pepper (or to taste); 10.75 ounces condensed cheddar cheese soup (1 can, optional); 4 cups shredded sharp cheddar cheese (divided); ½ cup shredded Parmesan cheese