Creamy Mac and Cheese

My mother in Law sent this to me, I can't wait to try it.

Creamy Macaroni and Cheese


SERVINGS: 6

TIME: Prep: 20 min. Bake: 35 min.

Ingredients:
2 cups uncooked elbow macaroni
1/2 cup butter, cubed
1/2 cup all-purpose flour
1-1/2 cups milk
1 cup (8 ounces) sour cream
8 ounces process cheese (Velveeta), cubed
1/4 cup grated Parmesan cheese
1/2 teaspoon salt
1/2 teaspoon ground mustard
1/2 teaspoon pepper
2 cups (8 ounces) shredded cheddar cheese

Directions: Cook macaroni according to package directions. Meanwhile, in a large saucepan, melt butter. Stir in flour until smooth. Gradually add milk. Bring to a boil; cook and stir for 2 minutes or until thickened. Reduce heat; stir in the sour cream, process cheese, Parmesan cheese, salt, mustard and pepper until smooth and cheese is melted. Drain macaroni; toss with cheddar cheese. Transfer to a greased 3-qt. baking dish. Stir in cream sauce. Bake, uncovered, at 350° for 35-40 minutes or until golden brown and bubbly. Yield: 6 servings.