Crispy Chicken Mac & Cheese

1. Cook macaroni in salted water for 7-8 minutes.
2. Melt butter in a pot over medium heat. Whisk in flour and cook for 1 minute. Gradually add milk and cream, whisking.
3. Add cheeses (1.5 cups at a time) to the thickened sauce, whisking until melted. Season with salt and pepper.
4. Drain macaroni and mix into the cheese sauce.
5. Layer half of the mac and cheese in a cast iron pan, add more cheese, then top with the rest of the macaroni.
6. Bake at 350°F for 20-25 minutes.