Can You Put Cardboard In The Oven?

If you’ve ever found yourself in the midst of cooking or baking and suddenly realized you’re out of baking parchment or aluminum foil, you might have wondered if it’s safe to use cardboard as a substitute. After all, it’s paper-like, and paper goes in the oven, right? In this article, we’ll explore whether or not you can put cardboard in the oven, and why it may not be the best idea. So before you grab that pizza box or cereal box, let’s find out if cardboard can handle the heat.

Can You Put Cardboard In The Oven

Can You Put Cardboard In The Oven?

Have you ever found yourself wondering if you can put cardboard in the oven? Maybe you’re in a hurry and need a quick solution for reheating your leftovers, or perhaps you’re looking for an alternative cooking method. Whatever the reason, it’s important to know the facts before you make a decision that could potentially lead to a kitchen disaster.

Types of Cardboard

To better understand whether cardboard can be used in the oven, it’s important to know the different types of cardboard. There are two main types: plain cardboard and corrugated cardboard. Plain cardboard is often used for packaging and is made from a single layer of paper pulp. On the other hand, corrugated cardboard is made up of three layers – two layers of paper with a wavy layer in between.

Burning Point of Cardboard

One of the most crucial considerations when determining if cardboard can be used in the oven is its burning point. Cardboard ignites at different temperatures depending on its composition. While every type of cardboard has a different burning point, plain cardboard typically catches fire around 450°F (232°C), while corrugated cardboard can ignite at temperatures as low as 350°F (177°C).

Potential Dangers

Putting cardboard in the oven can pose several dangers. The obvious risk is the potential for a fire. When cardboard reaches its burning point, it can quickly go up in flames, causing an uncontrolled fire in your oven. This not only poses a risk to your kitchen and home but also endangers your safety.

Additionally, burning cardboard can release toxic fumes. Cardboard contains chemicals such as formaldehyde, which can be harmful when inhaled. Inhaling these fumes can lead to respiratory problems, eye irritation, and even long-term health issues.

Effects on Food

If cardboard catches fire inside the oven, the flames and smoke can contaminate your food with harmful toxins. Even if the flames are quickly extinguished, the residual smoke can leave a foul taste and odor on your food. Consuming food that has been exposed to burnt cardboard can also cause health issues and ruin the taste of your meal.

Cooking Techniques with Cardboard

Despite the potential risks, there are cooking techniques where cardboard can be used safely in the oven. One popular method is known as “en papillote,” which translates to “in parchment.” In this technique, food is wrapped in parchment paper or aluminum foil, and a layer of cardboard is placed underneath to provide insulation. The cardboard helps to evenly distribute heat and enhance the cooking process. However, it is crucial to ensure that the cardboard used is free from any ink, adhesives, or wax coatings.

Alternative Uses for Cardboard in the Kitchen

If using cardboard in the oven seems too risky, there are still alternative uses for it in the kitchen. Cardboard can be used as a makeshift cutting board to protect your countertops or as a liner for your refrigerator’s vegetable drawer to absorb excess moisture. Additionally, you can repurpose cardboard boxes as storage containers for dry goods or as dividers in your kitchen drawers to keep utensils organized.

Preventing Cardboard Accidents

To prevent any accidents or fires caused by cardboard in the oven, it’s essential to practice proper safety measures. Firstly, always double-check your oven for any lingering pieces of cardboard before preheating or cooking. Secondly, avoid placing cardboard directly on the oven racks as it can easily ignite. Instead, use a baking sheet or aluminum foil as a barrier between the cardboard and the oven surface.

Tips for Using Cardboard in the Oven

If you decide to use cardboard in the oven, here are some essential tips to follow to ensure safety:

  1. Use plain cardboard rather than corrugated cardboard as it has a higher burning point.
  2. Cut the cardboard to size and ensure it fits snugly on the baking sheet or aluminum foil.
  3. Avoid using cardboard with any ink, adhesives, or wax coatings.
  4. Monitor the oven closely while the cardboard is inside, and never leave it unattended.
  5. Do not exceed the recommended temperature for using cardboard in the oven.
  6. Properly dispose of the cardboard after use and clean the oven thoroughly to remove any food or residue.
Can You Put Cardboard In The Oven?

Safe Oven Practices

While cardboard may have some limited uses in the oven, it’s crucial to prioritize safety in the kitchen. Here are some general oven safety practices to follow:

  1. Always read the manufacturer’s instructions for your oven and follow them carefully.
  2. Regularly clean your oven to remove any grease or food residue that can increase fire risk.
  3. Never leave the oven unattended while cooking.
  4. Keep flammable items away from the oven, including cardboard, paper towels, and oven mitts.
  5. Use oven mitts or heat-resistant gloves when handling hot dishes or bakeware.
  6. Install a smoke detector near your kitchen to provide an early warning in case of a fire.


In conclusion, while it may be tempting to use cardboard in the oven for convenience or experimentation, it is important to be aware of the potential dangers and risks. Cardboard has a low burning point, can release toxic fumes, and can contaminate food if it catches fire. However, with proper precautions, such as using plain cardboard without any coatings, monitoring the oven closely, and practicing overall oven safety, it is possible to use cardboard in limited and controlled ways. Ultimately, the decision of whether to put cardboard in the oven rests on your understanding of the risks involved and your willingness to take the necessary precautions.


  • Maria

    Maria Kennedy, the culinary genius behind "Grocer and Grind" blog, unites a love for cooking, local markets, and sustainability. Her practical recipes and grocery tips cater to all, while her passion for eco-conscious choices shines through. Join Jane on her flavorful journey, savoring life one bite at a time.

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