Cook the macaroni according to package directions.
While the macaroni cooks, prepare the bacon and chicken.
In a large saucepan, combine milk, ranch dressing, garlic powder, and half the cheddar cheese.
Once the cheese has melted and the sauce is smooth, add in the cooked macaroni and stir until fully coated.
Fold in the cooked chicken and chopped bacon, making sure they are evenly distributed.
Transfer the mixture to a greased baking dish and top with remaining cheddar cheese.
Bake at 350°F (175°C) for 20-25 minutes until bubbly and golden brown.
Let it cool for a few minutes before serving to enhance flavors.