Eggplant in a baking pan
Why You Should Never Use Glass Or Ceramic Bakeware In A Toaster Oven
Glass or ceramic bakeware, even if labeled as "oven-safe," shouldn't be put in toaster ovens due to the risk of thermal shock. Glass can even expand when exposed to high heat.
This is because the heating elements in a toaster oven are located much closer to the bakeware due to the appliance's small size. It's just not worth taking the risk.
When selecting bakeware for your toaster oven, check the owner's manual or check the manufacturer's website for specific guidelines and recommendations.
Generally, steel or aluminum bakeware are the top choices for toaster ovens, as each responds well to changes in heat and can withstand close exposure to the heating elements.
Silicone baking mats and small pizza stones designed for toaster ovens are also good options. A quarter-sheet baking pan that's 9 by 13 inches can also work well.
Disposable aluminum pans can be used in a toaster oven, although care should be taken when handling them. Just don't let the foil touch the heating elements.