Ingredients

  • 1 lb macaroni noodles
  • 1 egg
  • 4 tablespoons unsalted butter
  • 1/4 cup all-purpose flour
  • 2 1/2 cups whole milk
  • 2 teaspoons mustard powder
  • 4 3/4 cups cheddar cheese, grated
  • 1 teaspoon black pepper
  • 1/2 teaspoon salt
  • 1/2 teaspoon seasoning salt

Method

  • Heat oven to 350 and grease a large 2 to 3 quart baking dish.
  • In a large pot of salted water cook macaroni until still firm, about 4 minutes and drain.
  • Beat the egg in a bowl and set aside.
  • In a large saucepan melt butter over medium-low heat and whisk in flour, stirring constantly, for 5 minutes.
  • Whisk in the milk and mustard until smooth.
  • Cook until very thick, stirring constantly for 5 minutes.
  • Reduce heat to low.
  • Slowly pour 1/4 cup of the sauce into the beaten egg, whisking constantly, to temper the egg.
  • Pour egg mixture back into the sauce.
  • Reserve 1/2 cup of the cheddar and stir in the rest into the sauce until melted. Add the pepper and salts.
  • Stir in the macaroni and pour into the baking dish and top with the reserved cheese.
  • Bake until bubbly or golden, 20 to 25 minutes.