Gather all ingredients. Preheat oven to 350 degrees F (175 degrees C). Coat a 9- x 13-inch baking dish with cooking spray.
In a large bowl, stir together cream of chicken soup, milk, ranch dip mix, salt, hot sauce, pepper, paprika, garlic powder, and 1 cup of the sour cream until combined. Add hashbrowns, chicken, bacon, and 1 cup of the cheese; mix until fully combined.
Transfer mixture to prepared baking dish. Sprinkle evenly with remaining 1 cup cheese. Cover with aluminum foil.
Bake in the preheated oven until potatoes are tender, about 45 minutes. Uncover; bake until cheese is melted, about 10 minutes. Let stand 10 minutes before serving
Dollop evenly with remaining ¼ cup sour cream; garnish with bacon and scallions.
