Reheating Lasagna in the Microwave: A Step-by-Step Guide

How to Reheat Lasagna in the Microwave: A Step-by-Step Guide

Lasagna is a popular Italian dish known for its layers of pasta, cheese, and rich sauce. It’s a hearty and satisfying meal that many people enjoy. However, if you find yourself with leftover lasagna, you may be wondering how to properly reheat it without sacrificing its flavor and texture. In this article, we will give you a step-by-step guide to reheating lasagna in the microwave.

Microwave Reheating Lasagna: The Basics

Microwave reheating lasagna is a convenient and quick method. However, it requires a few steps to ensure that the lasagna retains its moisture and deliciousness. Here’s how to do it:

  1. Prepare a microwave-safe dish: Place a slice of lasagna on a microwave-safe dish or Tupperware container. It’s important to use a microwave-safe dish to avoid potential damage or accidents.
  2. Add moisture: Add about two tablespoons of water to the top of the lasagna. This extra moisture will help prevent the lasagna from drying out during the reheating process.
  3. Cover with plastic wrap: Cover the lasagna with plastic wrap to create a seal and trap steam. This will help retain moisture and prevent the lasagna from drying out.
  4. Microwave in increments: Microwave the lasagna for 5 minutes, but in 60-second increments. This allows for more controlled heating and reduces the risk of overcooking or uneven cooking.
  5. Check for doneness: Gently remove the lasagna from the microwave as the plate or bowl will be hot. Let it sit for a minute to allow the heat to distribute evenly throughout the dish. Then cut a piece of the lasagna to make sure it is heated through. If it is not completely heated, place it back in the microwave in 30-second increments until it reaches the desired temperature.

Reheating Frozen Lasagna in the Microwave

If you have frozen lasagna that you want to reheat, you can use the microwave. Here are the steps:

  1. Defrost or microwave: You have two options for reheating frozen lasagna. You can thaw the lasagna overnight in the refrigerator and then follow the steps above to reheat from the refrigerator. Alternatively, you can place the frozen lasagna directly in the microwave and follow the same steps, but allow the lasagna to thaw longer before heating.
  2. Use the defrost function: Another option is to use the defrost function on your microwave for a few minutes to gently thaw the lasagna. Once it is partially thawed, you can reheat it using regular microwave settings.

Ensure proper heating

One challenge when reheating lasagna in the microwave is getting even heat throughout the dish. The cheesy and dense layers of lasagna can make it difficult to heat the center without drying out the top and pasta. However, there is a simple trick you can try to overcome this problem.
Using an apple corer or small knife, you can make a small hole in the center of the dish. Instead of discarding this small piece, place it on the side of the dish to heat with the rest of the lasagna. Reheating the lasagna with the hole in the center helps the heat reach all areas of the lasagna, including the harder-to-heat center.

Safety Precautions for Reheating Lasagna

When reheating any food, including lasagna, it is important to follow proper safety guidelines to prevent foodborne illness. Here are some important safety precautions to follow:

  1. Proper storage: If your lasagna contains meat or poultry, it is important to refrigerate or freeze it within two hours of cooking. To store lasagna safely, cover it tightly or place it in a secure storage container before placing it directly in the refrigerator or freezer.
  2. Shelf life: Lasagna will keep in the refrigerator for up to four days if stored properly. If you choose to freeze lasagna, it can be safely consumed within four months if kept at a constant temperature of 0 degrees Fahrenheit or below. Keep in mind, however, that the quality of the lasagna may gradually deteriorate over time.
  3. Reheating leftovers: It is important to note that lasagna, like many foods, should only be reheated once. If you have leftover lasagna that you don’t plan to eat right away, it’s best to freeze or refrigerate it in smaller portions. This eliminates the need to defrost and reheat the entire batch each time, reducing the risk of bacterial growth and foodborne illness.

Reheating Lasagna in the Oven

While reheating lasagna in the microwave is quick and convenient, you can also use the oven for another reheating method. Reheating lasagna in the oven can help preserve its texture and flavor. Here’s how to do it:

  1. Preheat the oven: Preheat your oven to 350 degrees Fahrenheit (175 degrees Celsius) to ensure even heating.
  2. Prepare the lasagna: Place the desired amount of lasagna in an ovenproof dish. If the lasagna is frozen, it’s best to let it thaw in the refrigerator overnight before reheating.
  3. Cover with foil: Cover the dish with aluminum foil to prevent the top from drying out during reheating.
  4. Reheat in oven: Place the covered dish in a preheated oven and bake for about 20-30 minutes, or until the lasagna is heated through. The exact time will vary depending on the size and thickness of the lasagna.
  5. Test for doneness: Remove the lasagna from the oven and carefully remove the foil. Use a knife or fork to test the temperature and make sure the lasagna is heated through. If necessary, return the lasagna to the oven for a few minutes.
  6. Serve and enjoy: Once the lasagna is heated to your desired temperature, remove it from the oven and let it cool for a few minutes. Serve the reheated lasagna while it’s still warm and enjoy!


Microwave reheating lasagna is a convenient and efficient way to enjoy leftover lasagna. By following the step-by-step instructions in this article, you can ensure that your reheated lasagna retains its moisture and deliciousness. In addition, it’s important to follow proper safety precautions when storing and reheating lasagna to prevent foodborne illness. If you prefer a different method of reheating, such as using the oven, you can also achieve great results with a slightly longer cooking time. With these tips in mind, you can enjoy the flavors of lasagna even after it has been stored in the refrigerator or freezer.


Can I reheat lasagna from the freezer in the microwave?

Yes, you can reheat frozen lasagna in the microwave. Just follow the same steps as reheating lasagna from the refrigerator, but allow extra time for the lasagna to thaw before heating.

How long should I microwave a slice of lasagna?

It is recommended that you microwave a slice of lasagna for 5 minutes, but do so in 60-second increments to avoid overcooking or uneven cooking. Check for doneness by cutting into a piece of lasagna to make sure it is heated all the way through.

Can I microwave lasagna more than once?

It is generally not recommended to microwave lasagna more than once. Reheating once is sufficient to ensure food safety. To avoid waste, it is best to store leftover lasagna in smaller portions so that you can reheat only what you intend to eat.

How do I keep lasagna from drying out during reheating?

To prevent the lasagna from drying out, add moisture by spooning about two tablespoons of water onto the top of the lasagna before reheating. Covering the dish with plastic wrap while microwaving will help trap steam and retain moisture.

Is it safe to microwave lasagna in a plastic container?

Yes, it is safe to reheat lasagna in a microwave-safe plastic container. Make sure the container is labeled as microwave safe and follow the manufacturer’s instructions. Avoid using containers that are not specifically designed for microwave use, as they may melt or release harmful chemicals when exposed to heat.

Can I reheat vegetable lasagna in the microwave using the same method?

Yes, you can reheat vegetable lasagna in the microwave using the same method described in the article. The steps for reheating lasagna are the same for both meat and vegetable lasagna. Adjust the heating time based on the thickness of the lasagna and your desired temperature.