Classic British Macaroni Cheese

Method

1. Preheat oven to 180°C (350°F).
2. Cook macaroni in salted boiling water until al dente, drain.
3. In a saucepan, melt butter, add flour, and cook for 1 minute.
4. Gradually whisk in milk, bring to a simmer, and cook until thickened.
5. Stir in cheeses, mustard, salt, and pepper until melted and smooth.
6. Mix in cooked macaroni, transfer to a baking dish, and top with breadcrumbs.
7. Bake for 20-25 minutes until golden and bubbly.
8. Let rest for 5 minutes before serving.