5 Things You Shouldn’t Put in a Toaster Oven (And Why Should You?)

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Toaster ovens are common culinary gadgets found in practically every household. It’s a flexible culinary equipment that may be used for a variety of tasks. Moreover, it is compatible with a wide range of cookware. Unfortunately, not every cookware is appropriate for it. Moreover, several household goods might pose problems when placed in a toaster. So, what exactly are these items you can’t put in a toaster oven?

We can condense anything you can’t put in a toaster oven into five words. Styrofoam, plastic, parchment paper, glassware, and mugs and cups are examples of these items. As a result, if you want to cook or reheat food in a toaster oven using these items, you may wish to explore other choices as alternatives.

If you often use a toaster oven, you should ensure that everything you put inside is safe and will not create any problems. Though the items listed above are often used for reheating and cooking, you may be wondering why they should not be used in a toaster oven.

This article will provide an in-depth discussion of the subject. As a result, you will be aware of the cause and will avoid placing such items in your toaster oven.

Let’s get this party started!

What can’t you cook with a toaster oven?

Although a toaster oven works with many things, there are still certain items that you should never put in it. Styrofoam, plastic, parchment paper, glassware of any sort, and all mugs and cups are examples.

While some items are suitable for cooking and reheating in certain appliances, the uneven heating and unpredictable temperature of a toaster oven might harm them. As a consequence, you risk spoiling your food and potentially damaging your toaster oven.

Please continue reading for a more detailed explanation. Each item and its accompanying effects, as well as the reasons why you can’t put them in your toaster oven, are listed below.


Styrofoam is made from expanded polystyrene. Sadly, despite the fact that toaster ovens do not heat up as quickly as other ovens, such a material cannot survive the heat.

In summary, never put styrofoam containers in the oven as a matter of thumb. Additionally, since styrofoam is very flammable, it should not be used in or near an oven.

Styrofoam containers may be used to keep products in the refrigerator, but they should not be used to cook or reheat food in your toaster oven.


Toaster ovens should not be used with plastic materials since they will melt as the temperature increases. As a result, plastic materials cannot be used in other types of ovens.

Whichever plastic it is, it should not be used in a toaster oven since it may melt from the inside or completely. Moreover, it might possibly result in a fire hazard.

To summarize, keep plastic objects away from your toaster oven at all times. For example, if you use one to store food in the refrigerator, remove the food from the plastic before reheating in the toaster oven.

Paper Parchment

Some materials should not be used in a toaster oven, according to some toaster oven guidelines, and the first item on such lists is paper, which includes napkins and plates.

If your toaster oven does not come with explicit instructions not to use paper, you may experiment using parchment paper. Nevertheless, if it does not say that the parchment paper is safe, we recommend that you keep it away from your toaster oven.

Even if you can’t locate toaster oven instructions, the parchment paper producers will tell you not to use these papers in your toaster oven.

While parchment paper can resist higher temperatures than other materials, it may still burn if it comes into contact with your oven’s heating bars. As a result, if you must use one, be certain that it does not come into contact with the heating element.


Glassware dishes remain suspect since most individuals have broken glassware due to excessive heat. Most glassware makers, however, indicate that their items are toaster oven safe.

Check your manufacturer’s instructions to verify whether your glassware is safe to use in the toaster oven. In addition, if you have another dish, use it instead of glass to be safe.

Cups and mugs

If you plan on heating your beverages in mugs and cups in your toaster oven, we advise you to reconsider. They are not suitable for use in a toaster oven.

While some manufacturers advertise that their coffee cups are toaster oven safe, they do not employ traditional porcelain, earthenware, or china mugs. They will shatter in the toaster oven or when you take them out.


So, what exactly can’t you put in a toaster oven? In a nutshell, avoid using your toaster oven with styrofoam, plastic, parchment paper, glasses, and all mugs and cups. These items may create issues with your toaster oven. As a consequence, they risk contaminating your food or, worse, damaging your toaster oven.

As a general guideline, review your manufacturer’s instructions to verify that the items you put in your toaster oven are completely safe and will not create any problems.

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