Cooking and heating up in the microwave oven
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Suitable materials
• Porcelain, glass ceramic and heatproof glass
• Plastics which are heatproof and microwave-suitable (note: plastics may
become discoloured by foods or become warped by the heat)
• Baking
paper.
Overview of suitable materials
The following list is a general guide to help you choose the correct cooking dishes:
Cooking dishes
Microwave
Heatproof glass
Yes
Non-heatproof glass
No
Heatproof ceramic
Yes
Microwave-suitable plastic dishes
Yes
Baking paper
Yes
Metal
No
Aluminium foil/containers
Limited suitability
Materials that are partially suitable
• Stoneware and ceramics. Use clay containers only for defrosting and for short
cooking times because the air and water content of the material could cause the
clay to crack or break.
• Dishes with gold or silver trim should only be used if they have been labelled
“microwave-safe” by the manufacturer.
• Never use aluminium foil in large quantities. It can however be used e.g.
in small pieces to cover sensitive parts. You can also cover the corners of
containers to prevent overcooking as the microwave energy is primarily
concentrated on the corners. Maintain a distance of 2.5 cm between the foil and
the internal wall.
• Aluminium containers (e.g. for ready meals) are partially suitable, but they must
be at least 3 cm high to be used in the microwave oven.
