Add 1 ½-2 pounds chopped red potatoes, to the slow cooker.
Add 1 cup sour cream, ½ cup milk, 1 can condensed cream of potato soup, 1 (1-ounce) packet dry buttermilk ranch dressing, and salt and pepper to taste. Stir to combine.
Cover and cook on HIGH for 2-3 hours or LOW 4-5 hours. Stir just before serving and top with bacon bits or crumbled bacon and chopped parsley.