Want to avoid discarding cracked plates or damaged containers? Before cooking, learn what not to use to heat food in a microwave. Ignoring the compatibility of your cookware with the appliance can ruin your food, cause a fire, or even lead to an explosion. Some materials are strictly off-limits, while others may have exceptions.
Non-Specialized Plastics
Plastic not designed for microwaves releases harmful toxins when heated, which can easily seep into your food. Prolonged heating in substandard plastic containers may leave you with a melted mess. Similarly, using plastic wrap can have a comparable effect, as carcinogens from polymer materials can contaminate your meals. Always use microwave-safe plastic containers.
Plates with Gold Trim
Gold-trimmed dishes can spark when placed in a microwave, posing a fire hazard. Protect your appliance, yourself, and your home by avoiding such decorative plates. These beautiful items are not made to withstand microwave waves.
Porcelain Ware
Porcelain made in post-Soviet regions often contains lead, which was added to enhance durability and appearance. This makes porcelain cups, bowls, and salad dishes with lead additives highly unsafe for microwaves.
Metal Items
Metal reflects microwave waves, which can result in explosions. At best, this could destroy your microwave; at worst, it could cause injuries. Never use to heat food in a microwave in metal, aluminum, or enameled containers, as they will spark, potentially causing a fire or an explosion.
Crystal
Authentic crystal contains lead, and high-end varieties may include silver. The uneven thickness of crystal items means they won’t heat uniformly, and the metallic additives cause rapid temperature increases, leading to cracks or shattering. Avoid experimenting with cherished crystal pieces.
Wooden Items
Wooden utensils, though rare in the kitchen, may overheat and char in a microwave. While brief heating cycles for specific foods might be safe, prolonged exposure can cause issues. Be cautious with fatty or sugary foods and consider that wood, a natural material, contains moisture. Microwave waves interact with water molecules, potentially warping “fresh” wooden items.
Paper Products
Disposable paper and cardboard containers are generally safe for brief microwaving but unsuitable for long cooking, especially with greasy foods. Wax or plastic-coated packaging will melt, contaminating your food. Safe options include paper towels and parchment paper for lining trays or baking muffins. Avoid recycled paper, which may contain toxins or metals.
Pro Tip: Steer clear of heating painted paper boxes, foil-wrapped items, or containers from fast-food chains. Use parchment paper for reheating sandwiches or similar items.
Glassware
The ideal material for microwaving is glass. Microwave waves pass through glass without interference, and cleaning is hassle-free. Additionally, you can serve food directly in glass dishes, preserving your table setting’s appeal. Modern glassware, including heat-resistant glass-ceramic options, comes in various forms—from pans and pots to plates and bowls. Such items handle temperatures from -40°C to +1000°C, making them versatile for stovetops (except induction) and ovens.
Important: Glass is sensitive to sudden temperature changes. Avoid placing a hot dish on a cold surface or moving a chilled item directly into a microwave to prevent cracking.
Ceramic Cookware
Ceramic, porcelain, and earthenware generally work well in microwaves but require caution. Modern ceramics might include additives that alter their microwave safety. Always inspect for cracks or chips, as moisture trapped during cleaning can cause breakage. Simple designs are best for serving dishes.
Silicone: Yes or No?
Silicone mats and molds are microwave-safe, making them perfect for baking muffins, rolls, casseroles, and other treats. The only exception is items marked as unsuitable for microwave use.
Specialized Cookware
Many brands offer microwave-specific cookware, often made from glass-ceramic materials with special coatings to enhance heat absorption and non-stick properties. These are excellent options for safe and efficient cooking.
Combination Microwaves
If your microwave includes grill or convection modes, you can use cookware typically unsuitable for microwaves—such as metal pots and pans—provided the microwave function is disabled. Always double-check before use.
Cookware selection is crucial for microwave use. Choosing the right materials ensures the longevity of your appliance and keeps you safe from mishaps. Before preparing your favorite dish, make sure your cookware is up to the task.