Microwave Using Metal or Foil

Metal cookware should not be used in a microwave. Metal will not allow microwaves to penetrate; the food behind the metal will not be cooked. The metal could also cause arcing in the oven.

Microwave convection ovens can use metal and foil safely during the convection cooking.Metal (aluminum foil) can be safely used in a microwave but certain guidelines must be followed to prevent damage to the oven. The following describes the proper use:

  • Aluminum foil is used to shield portions of a food item to prevent overcooking. (i.e. leg tips and wings of a turkey or ends of a leg of ham). It should be a small amount of foil when applied and it should also be pressed close to the food item. No foil should be sticking up or out away from the food product. "Flags" or pieces of foil standing up will work as an antenna which could cause arcing.
  • Do not completely cover any food item with aluminum foil. Do not leave metal twist ties on bread packages or other plastic bags when warming a food product. The metal twist ties act as an antenna, and will cause arcing and possible damage to the oven.
  • Metal clamp on a turkey will have to be left in while defrosting since it is frozen into the bird. It is not a problem because of the size of the food product and the majority of the metal clamp is covered by portions of the bird. However, the clamp should be removed once the bird has defrosted, and is ready for cooking in the microwave.