How long is lasagna good for in the fridge?

In this brief guide, we will answer the query, “How long is lasagna good for in the fridge?” and will discuss how to properly store lasagna?

How long is lasagna good for in the fridge?

If stored correctly, lasagna may be kept in the refrigerator for up to a week. A typical lasagna dish is composed of tomato sauce, ground beef, lasagna noodles (or spaghetti), and ricotta cheese. On the other hand, the best-by date and the cooking process may affect how long lasagna may be preserved. The average temperature of a domestic refrigerator is up to 7°C (1).

According to the Centers for Disease Control and Prevention, an estimated one in six Americans (or 48 million people) become sick, 128,000 are hospitalized, and 3000 die of foodborne diseases every year. Therefore, it is essential to have correct practices regarding the storage of food leftovers. Incorrect storage may lead to food illness (5).

What is the shelf life of lasagna in the freezer?

 If you can’t wait that long to consume your lasagna, you can always store it in the freezer, that is, at -18 °C (2). Your lasagna may be stored in the freezer for up to three months! If you aren’t going to use the food right away, freezing it is a no-brainer. 

You’re wasting your time and money if you toss out any leftovers. For this reason, it is important to freeze the parts of lasagna that you are not going to consume. It is a recipe that freezes well, so prepare an extra pan of lasagna and store it for later use. It is important that it chills right after cooking, so that it spends only a short period in the temperature danger zone, which is between 5 and 60 °C (2).

How many people can a lasagna feed?

Baked in a large casserole dish, lasagna is a filling and filling supper. How many people does this dish serve? In a 13 x 9-inch baking dish, a normal lasagna serves eight people. You can serve six people if you create larger servings.

If you just have a small household, you may reduce the recipe in half and use a smaller pan to save money and time. Freezing and reheating leftover lasagna is a no-brainer. As with casseroles, lasagna is a popular dish to bring to family gatherings. 

For Thanksgiving and Christmas, I believe lasagna was served. Regardless of the season, lasagna is a wonderful addition to any celebration. Next, where are you going to take your lasagna?

How to store lasagna?

You may securely keep your lasagna in the refrigerator or freezer. Lasagne that isn’t stored in airtight containers runs the risk of getting freezer burned or spoiling more quickly.

  • Always use airtight containers for your lasagna.
  • For containers without lids, use aluminum foil or transparent wrap.
  • Single portions of lasagna may also be stored in plastic bags.
  • If you want to freeze lasagna, make sure it’s covered with sauce before doing so.
  • Lasagna that has been left out at room temperature for an extended period should not be stored.
  • Remember to keep your frozen lasagna in its original container if you prepared it from scratch.

What is the shelf life of different types of lasagna?

According to the USDA, any leftovers can be kept in the refrigerator for 3 to 4 days or frozen for 3 to 4 months. Although safe indefinitely, frozen leftovers can lose moisture and flavor when stored for longer times in the freezer (4).

A vegetarian or meat lasagna will keep for the same length of time as either. Meat and vegetables have the same shelf life, a fact that is often overlooked. While the contamination of microorganisms is the main cause of deterioration of vegetables, oxidation processes are the major cause of deterioration of meat quality and shelf life of meat products, leading to negative changes in nutritive value and in sensory and physicochemical properties of meat (3). If the smell or color of your lasagna changes, toss it out right away. If the pasta or sauce in your lasagna has dried out, you should toss it away.

How To Reheat Lasagna?

Once you’ve mastered the art of storing and reheating lasagna in the oven, microwave, or even a pan, you’ll be able to enjoy it just as much as the first time.

When reheating leftovers, be sure they reach 165° F as measured with a food thermometer. The moist heat that is created during reheating will help destroy harmful bacteria and will ensure uniform cooking (4). 

Reheat in the oven

To begin, heat the oven to 400 degrees Fahrenheit. Make sure the lasagna is covered with aluminum foil before placing it in the oven on the middle shelf.

The fillings should begin to sizzle after being reheated. Then, using a kitchen thermometer, determine whether the temperature inside the house is more than or equal to 165 degrees Fahrenheit. Depending on the size and number of layers, this might take up to an hour.

Reheat in the microwave

  • Put the lasagna in a microwave-safe dish and cook it for a few minutes. Use microwave-safe plastic wrap to keep your food from becoming messy.
  • Thaw the frozen lasagna in the oven using the defrost setting. 5 to 10 minutes may be required, depending on the size of the item.
  • Once the lasagna has thawed, turn the oven’s heat up to its highest setting. For medium-sized dishes, cook for 2 to 3 minutes.

    Five to ten minutes is the ideal time for larger animals. Make sure the lasagna reaches a temperature of 165 degrees F before serving.

Reheat in a skillet

  • Pour out the thawed lasagna from the fridge onto the skillet.
  • From medium to high, heat the stove.
  • Remove the lasagna from the pan and stir in some water, stock, or pasta sauce until it’s a little looser.
  • As soon as the pasta is done cooking, cover it with the lid and lower the heat.
  • Cook for around 15 to 20 minutes by stirring often.

Make sure to defrost the lasagna overnight in the refrigerator if you want the best results and the fastest reheating. Thaw it in the microwave, then bake it in the oven for rapid warming from frozen.

How to Tell If Your Lasagna Is Spoiled?

A rotten lasagna is easy to tell since the noodles have dried up and the tomato sauce or cheese has a terrible scent, because lipids found in the meat and cheese or sauce go through oxidation. Vegetables change in texture. In addition, the color is a little darker than usual. In addition, the flavor has changed.

Alternatively, mold may form on the lasagna’s surface or the whole dish. If you see any of the aforementioned symptoms, throw away the food immediately since it might pose a danger to your health.

What are the symptoms of eating bad lasagna?

You ate rotten leftovers, would you realize you had food poisoning? Here are some warning symptoms of food poisoning, as listed by the Mayo Clinic.

  • Fever
  • Nausea
  • Vomiting
  • Diarrhea

If you consume anything that isn’t healthy, you may begin experiencing these symptoms right away or it may take days or even weeks. These sensations may last for hours or even days. “24-hour bug” often refers to a moderate episode of food poisoning. 

If your symptoms continue to worsen, you should seek the advice of a medical professional. Food poisoning may lead to dehydration, which can be dangerous. 

When you consume food that hasn’t been properly handled and kept, you’re more likely to get food poisoning. When storing and reheating your lasagna, be sure to pay great attention.



In this brief guide, we answered the query, “How long is lasagna good for in the fridge?” and discussed how to properly store lasagna?



  1. Roccato, A., Uyttendaele, M., & Membré, J. M.  Analysis of domestic refrigerator temperatures and home storage time distributions for shelf-life studies and food safety risk assessment. Food Res Int 2017, 96, 171-181.
  2. Coorey, Ranil, et al. “The impact of cooling rate on the safety of food products as affected by food containers. Compr. Rev. Food Sci 2018, 17, 827-840.
  3. Horbańczuk, Olaf K., et al. “The effect of natural antioxidants on quality and shelf life of beef and beef products.” Food technol biotechnol, 2019, 57, 439.
  4. Leftovers and food safety. USDA. 2020.
  5. Stenger, Kristen M., et al. A mixed methods study of food safety knowledge, practices and beliefs in Hispanic families with young children. Appetite, 2014, 83, 194-201.

Hi, I am Charlotte, I love cooking and in my previous life, I was a chef. I bring some of my experience to the recipes on this hub and answer your food questions.