It's optional, but for crispy skin you'll need to transfer the cooked chicken to a baking sheet and place it under the broiler for 3-5 minutes, or until the skin is golden brown and crispy. However, watch it VERY closely to prevent burning! Broilers are 500F+ degrees and even 30 seconds too long can cause you perfectly cooked chicken to burn. It would be an ultimate shame if that happened so make sure to watch it extremely carefully, stand in front of your oven without being distracted so you can remove it at the perfect second in time!