01 -
Bring a large pot of salted water to a boil. Add elbow macaroni and cook according to package directions until al dente. Drain thoroughly and set aside.
02 -
In a medium saucepan, melt butter over medium heat until fully liquefied.
03 -
Whisk whole milk, salt, black pepper, and mustard powder (if using) into the melted butter until fully combined.
04 -
Gradually add shredded cheddar cheese to the saucepan, stirring constantly until the sauce is completely smooth and homogeneous.
05 -
Fold cooked macaroni into the cheese sauce, ensuring thorough coating. Serve immediately while hot.