For Food Safety and Quality Keep frozen. Do not thaw. Appliances vary. Adjust cooking times as needed. Food must be cooked thoroughly. Internal For food safety and quality keep frozen. Do not thaw. Appliances vary. Adjust cooking times as needed. Food must be cooked thoroughly. Internal temperature needs to reach 165°f. Read and follow these cooking directions. Preparation directions conventional oven. Preheat oven to 425°f. Arrange frozen onion rings in a single layer on a baking sheet. Bake according to chart to desired color and crispness, stirring halfway through cooking time.