Classic Macaroni and Cheese

Name: Classic Macaroni and Cheese
Prep time: 5 min
Cook time: 10 min
Total time: 15 min
Yield: 6
Ingredients: Ingredients; 2 cups elbow macaroni (or other small pasta); 2 tablespoons butter; 2 tablespoons all-purpose flour; 2 cups whole milk; 2 cups shredded sharp cheddar cheese; 1/2 cup shredded mozzarella cheese (optional for extra creaminess); 1/2 teaspoon Dijon mustard (optional); Salt and pepper, to taste; 1/4 teaspoon paprika (optional, for a touch of flavor and color); 1/4 cup breadcrumbs (optional, for topping); 1 tablespoon butter (for topping)