Lightly grease the inside of a slow cooker.
In a large bowl, combine thawed hash browns, condensed soup, sour cream, melted butter, salt, pepper, and 1 1/2 cups of shredded Cheddar cheese.
Stir everything until well mixed.
Spoon the mixture into the prepared slow cooker and spread evenly.
Cover and cook on Low for 4–5 hours or until the potatoes are tender and heated through.
Sprinkle the remaining 1/2 cup of Cheddar cheese over the top before serving.