Preheat oven to 350˚. Lightly grease a 11/2-quart baking dish.
In a medium bowl, combine 1 cup cheddar cheese, cream cheese, sour cream, butter, dressing mix, and bacon. Add hash browns, stirring to combine.
mixture into prepared baking dish.
Bake for 30 minutes; sprinkle with remaining cheese. Bake 10 minutes more, or until hot and bubbly.