Gather all ingredients. Preheat oven to 350°F. Coat a 9x13-inch baking dish with cooking spray.
STEP 2
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 hash browns, chicken, bacon, and 1 cup of cheese; mix until fully combined.
STEP 3
Transfer mixture to prepared baking dish. Sprinkle evenly with remaining 1 cup cheese. Cover with aluminum foil.
STEP 4
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.
STEP 5
Dollop evenly with remaining 1/4 cup sour cream; garnish with bacon and scallions.