Preheat oven to 350°.
Lightly grease a 1½-quart baking dish.
In a medium bowl, combine 1 cup Cheddar cheese, cream cheese, sour cream, butter and dressing mix; stir until smooth.
Stir in hash browns, chicken, and half of bacon.
Spoon mixture into prepared baking dish.
Bake for 30 minutes.
Top with remaining 1 cup cheese and remaining half of bacon; bake for 20 minutes or until golden.
Garnish with chopped parsley, if desired.