Can Cardboard Go In The Oven? Is It Safe? - Cook Kitchen (2023)

We typically receive cardboard when we order pizza to be enjoyed at home because that is the material that pizza shops most frequently use for delivery and takeout.

The question of whether or not you can put cardboard in the oven is one that is frequently asked in a world where people are constantly looking for new and inventive ways to save time and money.

Can cardboard go in the oven?While it is possible, it is not recommended to bake with cardboard. In the oven, cardboard is easily flammable. Therefore, even if the temperature is at its lowest setting, you still need to keep an eye on the cardboard to minimize the risk of an accident. Learn more by keep reading!

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What Materials Makeup Cardboard?

Using glue or another adhesive, layers of paper are pressed together to create cardboard. It can be used in a variety of ways because it is an affordable, lightweight, and durable material.

But just because something is cheap doesn’t mean it can’t be recycled! If you’re debating whether or not to recycle your cardboard boxes, this article may be able to assist you.

Anyone who wants to bake their items in the oven directly on top of some cardboard can do so, provided the cardboard hasn’t been chemically treated or painted (in which case, the answer would be no).

Keep in mind that some paper products can’t be microwaved because they have coatings like wax or others that could catch fire when heated.

Avoid going too far and attempting to microwave a piece of cardboard because it might also catch fire.

Can Cardboard Go In The Oven?

Cardboard can be placed in the oven in a warm setting, but make sure to watch it carefully at all times. Despite the fact that the warm setting on the oven creates a low temperature, you still shouldn’t leave the cardboard inside because it can easily catch fire.

For heating, 170 to 200 degrees Fahrenheit is generally considered to be the safest range. You can leave the box in the oven for 15 minutes at this temperature if you check on it every two minutes.

Another thing is to be cautious when taking it outside because cardboard can easily become hot, even at a low temperature.

Read More: Why Do They Call It Oven?

What Will Happen If Put Cardboard In The Oven?

You must understand what will happen when we put the cardboard in the oven in order to provide a precise response to the question, “Can you put cardboard in the oven?”

Anyone who wants to bake their item in the oven on top of some cardboard can do so as long as the cardboard hasn’t been painted or chemically treated in any way.

Remember that some paper products cannot be microwaved because they have wax or other coatings that could catch fire if heated. Avoid going overboard and attempting to microwave a piece of cardboard because that could also set it on fire.

The lowest temperature at which something will ignite is known as the ignition temperature. It will catch fire more readily the higher the ignition point. In other words, if you put a piece of cardboard in an oven that is set to 350 degrees Fahrenheit, there’s a chance that it might catch fire and burn to a crisp!

Since recycled paper makes up the majority of cardboard, baking it in the oven is not a wise choice. The cardboard might catch fire due to the heat, and the flames might then spread to your food. Burning cardboard also produces poisonous, hazardous fumes that should not be inhaled.

This means that you should avoid baking anything on top of any kind of cardboard box or sheet, even if it hasn’t been painted or exposed to hazardous chemicals. It’s just a bad idea because fire might start and create hazardous kitchen conditions.

Furthermore, you must never use any kind of wax paper in the oven. You will end up with some really dangerous fumes escaping through the air vents in your kitchen if it has a waxy coating. So now that you know the answer, can you put a pizza box in the oven?

Cardboard Pizza Box: Safe Or Not?

No, it’s not advisable to bake a pizza box made of cardboard. The enclosed heat of the oven, however, means that even though you are able to do so, you should always be aware that a cardboard pizza box could catch fire at any time.

You can assume that low settings are safe because, in general, cardboard burns at higher temperatures. However, with an oven, you can’t be sure, so it’s best to keep an eye on things as your cardboard heats up.

Pizza boxes can withstand the heat of freshly cooked pizza, but they can catch fire at any time when they come into contact with an oven’s heating system.

As a general rule, avoid putting a cardboard pizza box in the oven because of this. If you have a baking tray to put in the oven, move your pizza to it instead. In this way, there is no chance of setting your pizza on fire due to the cardboard.

You can also preheat your oven to a low setting and keep it closed with the box if your only concern is to keep the pizza warm. In this way, once the oven is hot, you can turn it off and let the pizza and box inside stay warm.

When Will Cardboard Catches Fire?

The general rule is that cardboards will burn when the temperature reaches 400 degrees Fahrenheit. Even though the temperature is already high, the enclosed heat of an oven can still cause the cardboard to ignite at a low temperature.

This makes a temperature of about 170 degrees Fahrenheit your best bet. Of course, it will be better if your oven has a lower setting.

A baking tray should always be used in the oven rather than a box whenever possible. It’s the best way to prevent potential fires in your home. Additionally, it will assist you in avoiding oven damage.

Why You Should Never Put Cardboard In the Oven?

The type of cardboard and your knowledge of its past will determine whether or not it should be baked.

It might be best to keep material away from a heat source for an extended period of time if you are unsure of the material’s previous life. This is primarily due to issues with chemicals and paint.

Cardboard: A History Of Toxicity

If you don’t recall, we discussed how recycled newspaper and junk mail or pulped wood fibers are used to make traditional paper products.

This helps us understand why people choose to use painted or treated cardboard boxes rather than just regular brown box boards (the kind used in).

Things like waterproofing, bleaching, and fire retardants would all be a part of the treatment. Cardboard is now safe to use as an oven rack or trivet IF it has not been treated after all of these treatments.

Therefore, avoid using the cardboard in your oven if you are unsure of its condition or just don’t want to take any chances.

Maximum Heat Capacity

500 degrees The highest temperature at which cardboard can be baked safely is 400 degrees Fahrenheit. It would be best to forgo this experiment entirely and look for another material to bake with if your oven has a higher heat capacity than that.

Remember that 500 degrees are the MAXIMUM temperature; therefore, it is not advisable to try your luck by going any higher.

Reduces The Time Required For Cooking

The fact that cardboard actually slows down the cooking process of your food is another reason why you shouldn’t put it in the oven.

The food will cook more quickly than if you used cardboard because the aluminum foil will reflect the heat back onto it. Therefore, cardboard not only poses a risk to your safety but also interferes with the even cooking of your food.

The Ignition Temperature

How hot an oven needs to be for cardboard to burn depends on a variety of variables, including thickness, coating, and chemical treatment, as we discovered when researching cardboard on Wikipedia.

However, the temperature at which treated cardboard will begin to catch fire, according to this website, is 175 degrees Fahrenheit.

Makes Your Food Taste Strange

Last but not least, be aware that baking cardboard in your oven will result in strange-tasting food. This is because the cardboard will release an unpleasant odor and taste that your food will absorb.

Therefore, even if you have the courage to try this experiment, be aware that it won’t be enjoyable to eat whatever comes out of the oven.

You should now be able to fairly easily comprehend why it is never a good idea to bake with cardboard.

Burning cardboard poses a fire risk in addition to being toxic and hazardous for inhalation.

There are numerous other risk-free ways to recycle and reuse this adaptable material. So reconsider your options the next time you want to recycle your cardboard boxes!


So, is it safe to bake cardboard? Yes, you can put cardboard in the oven, but we strongly advise against it. It is best to avoid putting any cardboard in the oven.

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