Can you put a pizza box in the microwave?





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We’ve all been there, staring down a cold slice from our favorite pizza joint or those leftover pieces from the night before – wondering how to reheat them perfectly. Have you ever found yourself gazing at your microwave and then back at that bulky cardboard box, considering if the whole thing could just go in? You’re not alone! Indeed, I have also pondered this very predicament myself which led me on a quest for answers and safety concerns around microwaving these convenient little pizza boxes.

In this blog post, we’ll navigate the facts of zapping cardboard pizza boxes in the microwave, unravel its potential risks and explore practical alternatives for warming up that delightful piece of pie – making sure your dining experience remains effortless and satisfying!

Key Takeaways

  • Microwaving a pizza box can be unsafe due to the potential fire hazards it poses.
  • Before microwaving, check if the pizza box is made of pure cardboard without plastic or metal parts.
  • Use low power settings and do not exceed the recommended microwaving time (around 30 seconds) to prevent overheating and reduce fire risks.
  • Alternatives to microwaving include transferring the pizza to a microwave – safe plate, using a conventional oven, or heating it on the stovetop.

Is it Safe to Microwave a Pizza Box?

When it comes to microwaving a pizza box, safety should be the top priority. The composition of cardboard and the potential hazards involved make it important to take precautions before attempting this method of reheating.

Cardboard composition

Pizza boxes get made from cardboard. This is pure cellulose that comes from trees. It turns into strong, stiff boards. The pizza delivery boxes do not have inks or wraps on them. They also do not use adhesives and plastics.

But some types could have paper coating or plastic glue. Cardboard like this can be a risk if you heat it up too much for too long! So, check your box first to make sure it’s safe to put in the microwave.

Potential hazards

When microwaving a pizza box, there are potential hazards to be aware of. One hazard is the risk of starting a fire. If the pizza box contains any metal parts, it is not safe to microwave it as it can cause sparks and flames.

Additionally, if the cardboard box has grease or oil stains, it can increase the fire risk. Another hazard is that the cardboard can become too hot and potentially burst into flames if microwaved for too long.

Therefore, it’s important to monitor closely and not exceed 1 minute of microwaving time to avoid these dangers.

Fire risk

Microwaving a pizza box can pose a potential fire risk. If the box contains grease or oil stains, it can easily catch fire when exposed to high heat. Even clean pizza boxes have the potential to burst into flames if they are microwaved for too long.

It is important to monitor the microwave closely and ensure that you do not exceed the recommended heating time, typically around 30 seconds on low power settings. Always exercise caution and follow safety guidelines when microwaving pizza boxes to avoid any fire hazards.

Tips for Microwaving Pizza Boxes Safely

To safely microwave a pizza box, start by removing any non-cardboard components such as plastic or metal. Use low power settings and closely monitor the box to avoid overheating.

Remove any non-cardboard components

To microwave a pizza box safely, it’s important to remove any non-cardboard components first. This includes things like plastic inserts, metal clips or ties, and paper liners. These non-cardboard parts can pose a safety risk in the microwave and may cause sparks or even start a fire.

So before you pop that pizza box in the microwave, take a quick look inside and make sure there’s nothing other than pure cardboard in there.

Use low power settings

When microwaving a pizza box, it is important to use low power settings on your microwave. This helps to prevent overheating and reduces the risk of potential fire hazards. By using low power settings, you can safely warm up your pizza without causing the cardboard to burst into flames.

Keep an eye on the pizza box as it heats up and make sure to follow the recommended microwaving duration, which is typically around 30 seconds. So remember, always use low power settings when microwaving a pizza box for a safe and delicious meal.

Monitor closely

I recommend monitoring the pizza box closely while it’s in the microwave. This is important to ensure that it doesn’t overheat or catch fire. Keep an eye on it throughout the microwaving process, especially if you’re heating it for longer than 30 seconds.

If you notice any signs of smoke or a burning smell, immediately stop the microwave and remove the box. Safety should always be a top priority when using appliances in your kitchen.

Alternatives to Microwaving Pizza Boxes

Instead of using the microwave, there are a few alternative methods for heating your pizza box. These methods ensure that your pizza stays tasty and your kitchen stays safe.

Transfer to microwave-safe plate

I recommend transferring your pizza from the box to a microwave-safe plate before heating it. This helps ensure that the heat is distributed evenly and reduces any potential risks associated with microwaving the cardboard box.

By using a microwave-safe plate, you can safely warm up your pizza without worrying about any possible hazards or safety concerns. It’s a simple step that can help protect both you and your food while maintaining the delicious taste of your pizza.

Use a conventional oven

If you’re worried about microwaving a pizza box, using a conventional oven is another option. Just remove the pizza from the box and place it directly on an oven-safe baking sheet or pizza stone.

Preheat your oven to around 350 degrees Fahrenheit (175 degrees Celsius) and bake the pizza for about 10 to 15 minutes, or until it’s heated through and crispy. Using a conventional oven can help ensure that your pizza warms up evenly without any potential safety concerns.

Plus, it may even result in a tastier slice!

Stovetop heating

If you don’t want to microwave your pizza box, another option is stovetop heating. Place a frying pan or skillet on the stove over low heat. Take your pizza out of the box and place it directly onto the heated pan.

Let it warm up for a few minutes until it reaches your desired temperature. Remember to keep an eye on it and flip it occasionally to ensure even heating. Stovetop heating can be a safe and effective way to warm up your pizza without using the microwave.


In conclusion, it is generally safe to microwave a pizza box for a short time to warm up your pizza. However, there are some important precautions to take. Make sure the box is made of pure cardboard without any coatings or adhesives, and always supervise the microwaving process closely.

If you’re unsure about the safety of microwaving a specific pizza box, consult the manufacturer’s instructions or contact their customer service for guidance. Stay safe and enjoy your delicious slice!


1. Can you put a pizza box in the microwave?

It is not safe to put a cardboard pizza box in the microwave due to temperature sensitivity and risks of bursting into flames.

2. What happens if you microwave a Dominos or Little Caesar’s pizza box?

If you heat these cardboard takeout containers too much, they could cause safety issues like fires because microwaves can raise the temperature quickly.

3. Are there guidelines for safe microwave temperatures for cardboard?

Microwaving cardboard boxes should be done at low degree heating but it’s best skip putting them in the microwave altogether due to safety concerns.

4. Can microwaving a pizza box make it burn?

Yes, high heat can make cellulose in the cardboard catch on fire very quick, so supervision is required if short microwaving is attempted.

5. Is there an alternative way to warm up my leftover slice?

Instead of risking your safety by attempting to warm up your food still inside its pizza box, try placing your slice on a plate before popping it into the microwave.

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