Yes, if you would like to keep this dip warm for a party it can be made in a slow cooker. Mix the cream cheese, sour cream, seasonings, and half of the mozzarella together. Place in a slow cooker that has been sprayed with non-stick cooking spray. Cook for 2-3 hours. Top with more mozzarella cheese and pepperoni. Let cook another 15-20 minutes before serving.