Ingredients
Method
- Preheat oven to 375°F. Cook macaroni in salted boiling water until just shy of al dente, about 7 to 8 minutes. Drain and set aside.
- Melt 3 tbsp butter in a large pan over medium heat. Whisk in flour, cook 1 minute. Slowly add milk, whisking, and simmer until thick, about 3 to 4 minutes. Off heat, stir in cheddar, fontina, mustard powder, and salt until smooth.
- Fold drained pasta into the sauce. Transfer to a buttered 9x13 dish.
- Mix panko, 2 tbsp melted butter, and Parmesan. Sprinkle over the pasta. Bake 25 minutes until golden and bubbling.
- Rest 5 minutes, then scoop onto plates and serve.
Notes
Let the casserole rest a few minutes after baking so the sauce sets and the portions hold their shape. If the topping isn't as crisp as you like, run it under the broiler for 1 to 2 minutes, watching closely. Leftovers keep in the fridge for up to 4 days.
