This is a quick and easy way to avoid the box mac and cheese. I found this recipe in a Cooking Light magazine and really liked it. I did substitute wheat flour and wheat pasta rather than regular macaroni and white flour.
Cook pasta according to package directions, omitting salt and fat. Drain and set aside.
While pasta cook, place wheat flour, salt, and pepper in a large saucepan. Add milk, stirring with a whisk until well blended. Drop cream cheese by teaspoonfuls into milk mixture; bring to a boil over medium-high heat, stirring constantly. Reduce heat; simmer 2 minutes or until thick and cream cheese melts, stirring occasionally. Stir in mustard, Worcestershire sauce, and garlic; simmer 1 minute. Remove from heat. Add cheddar cheese, stirring until cheese melts. Combine pasta and cheese sauce in a large bowl; toss well.