Spray a 6 quart slow cooker with non-stick spray.
Pour in the frozen hash browns, sour cream, cream of soup, butter, onion, 1 cup of the cheese, half the chopped scallions, half the cooked bacon, and salt and pepper.
Stir everything together and then top with the remaining cheese, bacon, and scallions.
Cover and cook on LOW for 4 hours.
