Keep frozen. Cook thoroughly. How to get things cookin': For best quality and food safety, follow these preparation steps: Keep 'em frozen 'til you're ready. Cook thoroughly before eating. Follow cooking instructions to make sure your munchies have reached 165 degrees F, as measured by a food thermometer. Adjustment to cooking times may be required due to variations in all ovens. Careful, 'cuz they will be hot! Mozzarella sticks prep: Conventional oven. Preheat your oven to a toasty 450 degrees F. Place frozen cheese sticks in a single layer on a non-stick baking sheet. Let 'em bake for 10 minutes. Allow cheese sticks to stand for a couple of minutes before digging in! Product not intended for microwave preparation. Sauce prep: Dip 'em! (Do not microwave sauce packet). Marinara sauce: Thaw unopened sauce packet in hot water for 6 to 8 minutes. Stir and serve. Discard any unused sauce.