One Pot Mac and Cheese - mrfood.com
1 pound spaghetti
1/4 cup (1/2 stick) butter
1/2 cup all-purpose flour
4 cups (1 quart) milk
6 cups (24 ounces) shredded sharp Cheddar cheese
1/2 teaspoon dry mustard
1 teaspoon salt
1 teaspoon black pepper
In a soup pot, cook spaghetti according to package directions; drain and set aside in colander.
In the same pot, melt butter over medium heat then stir in flour. Gradually stir in milk and cook 3 to 5 minutes, or until thickened, stirring frequently. Add cheese, dry mustard, salt, and pepper and stir for 3 to 5 minutes, or until cheese is melted.
Add spaghetti and cook 2 to 3 minutes, or until heated through, stirring constantly. Serve immediately.