Using aluminium foil containers in the Microwave Oven

We are regularly asked about the use of foil containers in the microwave. Many shops supply frozen or chilled prepacked meals that can be reheated or cooked either in a conventional oven or in a microwave oven.

They can, but with great caution unless familiar.

Aluminium is a metal so cannot be penetrated by microwave energy. This means that any microwaves are only absorbed through the top (open) part of the container to a depth of only about 3 cms. The aluminium effectively shields the sides and base of the of the food from overheating. This can be very useful when making delicate sauces.

Because aluminium is an excellent conductor of heat ( that’s why a lot of conventional cookware is made of aluminium) any heat in potential hot spots will be transferred around the container so more even heating can be achieved.

By far the greater benefits are:

That food can be cooked in the container rather than it needing to be transferred to a non metallic container.

Food toppings can be finished under the grill or browned as part of a combination oven cooking cycle.

foil trays

foil trays

In order to achieve best results and at the same time avoid damaging the microwave, these simple guidelines should be followed carefully.

Use only shallow foil containers, no deeper than 3 cms.

Use singly in the centre of the microwave glass tray to avoid getting too close to the oven sides.

Do not use foil or foil lined lids (if the food is completely encased in aluminium it wont heat at all.)

If there are no special instructions  for cooking in foil trays increase cook time by 10%.

Do not use bent or damaged foil trays. Clean and dispose (recycle) them.

Do use normal precautions and stir microwaved food and ensure that it is piping hot before serving.

About microwaveexpert

The Microwave Service Company is based in Sellindge, Kent and provides repairs to Domestic and Commercial Microwave Ovens including 24 volt Samsung Roadmate microwaves.
This entry was posted in General, Microwave tips and hints and tagged , . Bookmark the permalink.

5 Responses to Using aluminium foil containers in the Microwave Oven

  1. Neil says:

    Enjoyed reading your advice, and comments. Have you ever changed a pair of Sharp Microwave bulbs rated 125 volt 20 watt for a single bulb of 240 volts( the 125 volt bulbs E17 base hard to find)

  2. Eric GRANDJEAN says:

    Dear Sirs,

    We bought a few years ago, some microwaves AWI APS2000, 230/240 V- 50Hz, 1925 KW, 3,3 KW input. Do you sell spare parts or complete units in this reference ? Does AWI exist still ?

    Thank you for your return,

    Best Regards

    Concept Convergence (France)
    (+336 740 775 89)

  3. Mahua Mitra Karmakar says:

    A BIG THANKS.Can you please let me know about the time and temperature to make cake biriyani and cookies???? Your information is and will be of GREAT HELP.THANKS ONCE AGAIN.

    • Unfortunately not. I am an engineer used to their faults and repairing them rather than actually cooking set recipes. If you can find something similar online and try those cook times, just like ‘regular’ cooking, under cook and then cook for a little longer so that you don’t over cook them and you will find the ideal time for future.

Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s