Bring a large pot of lightly salted water to a boil. Add macaroni and cook for 8 to 10 minutes or until al dente; drain.
Melt butter in a saucepan over medium heat. Stir in flour, salt, and pepper until smooth, about 5 minutes. Gradually whisk in milk. Cook, whisking constantly, until mixture is thickened and bubbly, about 5 minutes more. Remove from heat and stir in cottage cheese.
Combine macaroni and cheese sauce in a 9x13 inch baking dish; top with cheddar cheese.
Bake in preheated oven until cheese is melted and lightly browned, about 20 minutes.
Interesting Facts
Cottage cheese is a great way to add creaminess to any dish.
Mac and cheese is a classic American comfort food.
Adding a bit of nutmeg to your cheese sauce can add a delicious depth of flavor.