Cook macaroni in boiling salted water until tender; drain.
Grate the cheese while the pasta is cooking. (Chunk cheese that is grated tastes so much better and is much less greasy than the packaged shredded cheese).
Melt Butter; blend in flour. Add milk, cook and stir until thick. Add salt, pepper, and cheese, stir until cheese is melted.
Pour the sauce into your baking dish and gradually add the macaroni to desired consistency. I like mine to be saucy so don't add as much pasta - your combination is based on your preference.
Bake 350 degrees for 45 minutes.NOTE: This recipe can be multiplied with great results.