Preheat the Oven: Preheat your oven to 350°F (175°C).
Cook the Pasta: Boil a pot of salted water. Cook the elbow macaroni according to the package instructions until just al dente. You want them slightly firm, as they will absorb some of the cheesy goodness in the baking process.
Prepare the Cheese Sauce: In a large microwaveable bowl, combine the cheddar cheese soup, evaporated milk, butter, salt, and pepper. Cover the bowl with plastic wrap, leaving a small vent for steam to escape, and microwave for 6-7 minutes, or until the butter is melted and the mixture is warmed through.
Layer the Dish: In a large baking dish (minimum 9x13 inches), spread 1/3 of the cooked macaroni. Top with 1/3 of the cheese sauce. Sprinkle with 1/3 of the shredded cheddar. Repeat the layers twice more, ending with the cheese on top.
Bake: Place the dish in the preheated oven and bake for 40-45 minutes. You want the top to be golden and bubbly.
Garnish and Serve: Once baked, sprinkle with dried parsley for a touch of color. Allow the dish to stand for about 5 minutes before serving to let it set.