At just over calories, Mac and Cheese is no longer off limits. Because the sauce is thickened with flour, low-fat milk works well in this. Directions. Cook macaroni according to package directions. In medium saucepan, melt butter over medium heat; stir in flour, and cook for minutes stirring constantly to form a roux; add salt and pepper; slowly add milk, stirring well after each addition. Cook and stir until bubbly. 12 hours ago This is the macaroni and cheese recipe I grew up on — creamy sauce, chewy pasta, and plenty of cheese. It always felt like a special treat to us.