Best Baked Macaroni and Cheese Recipe with Crispy Topping

8 Ounces cooked Elbow Macaroni
2 Cups grated Sharp Cheddar Cheese
2 Tablespoons Butter
2 Tablespoons All-Purpose Flour
2 Cups Milk
1/4 Teaspoon Paprika
Dash of Salt
Dash of Black Pepper
Topping:
1 Tablespoon Butter
1/2 Cup Panko Breadcrumbs