How do you fix undercooked lasagna? (1+ method)

In this article, we will answer the following question: “How do you fix undercooked lasagna?” and discuss how to fix undercooked lasagna by different methods, why should you fix undercooked lasagna and whether you can eat an undercooked lasagna.

How do you fix undercooked lasagna?

To fix undercooked lasagna, it is necessary to reheat the lasagna in the microwave oven or the conventional oven till the desired texture of the pasta is achieved or the meat is fully cooked (1).

The presence of liquid is necessary to ensure proper cooking by providing water for the water absorption from the pasta. The water absorbed by the pasta during cooking and storage affects the sensory properties of the pasta (4).

If the undercooked lasagna does not have enough sauce, the addition of sauce, such as spaghetti sauce or other type of sauce, or the addition of milk or water will be necessary (1, 4).

How to fix undercooked lasagna in the conventional oven?

To fix undercooked lasagna in the conventional oven, follow the instructions (adapted from 1):

  • Preheat the oven to a temperature of 205 °C (400 °F).
  • Add a cup of sauce (white, spaghetti or tomato sauce) evenly distributed in the lasagna and cover the dish with an aluminium foil.
  • Bake the lasagna for 30 minutes or till the desired texture is achieved and the meat has been cooked to a brown colour.
  • It is necessary to bake the lasagna till the minimum temperature of the lasagna in its centre achieves the temperature of 74 °C (165 °F) (5).

How to fix undercooked lasagna in the microwave oven?

To fix undercooked lasagna in the microwave oven, follow the instructions (adapted from 1):

  • The lasagna should be contained in a microwave-safe dish, otherwise, transfer the lasagna to a microwavable dish.
  • Add a cup of sauce or milk to the lasagna, distributing the liquid evenly.
  • Cover the dish with a plastic microwave-safe foil or a glass plate and place it in the microwave oven.
  • Cook the lasagna at high energy for 10 minutes or till the pasta is fully cooked and the meat has achieved a brown colour.
  • To ensure safe consumption, the centre of the lasagna should achieve a minimum temperature of 74 °C (165 °F) (5).

Why should you fix undercooked lasagna?

You should fix undercooked lasagna because it is not safe to consume undercooked foods, especially foods that contain perishable ingredients, such as lasagna (2, 3).

Proper cooking of food is important for its safe consumption, as cooking can effectively reduce the microbial contamination of the food and prevent foodborne diseases (1, 2).

The consumption of undercooked perishable foods, such as meat, is related to several food outbreaks involving pathogenic microorganisms and parasites (3).

Lasagna may contain different ingredients, including ricotta cheese, spaghetti sauce and eggs (2). The consumption of undercooked contaminated eggs and other undercooked ingredients in the lasagna can also lead to foodborne diseases (1, 2).

Another reason to fully cook the undercooked lasagna is that cooking improves the digestibility of the pasta and the absorption of certain nutrients and reduces the amount of antinutrients. Cooking improves the texture and flavour of meat and pasta (6).

In a few words, you should fix undercooked lasagna because it will increase the acceptability and appreciation of the dish, in addition to ensuring safe consumption concerning microbial safety (1, 5, 6).

Can you eat an undercooked lasagna?

Yes, you can eat an undercooked lasagna if the lasagna has been made with fully cooked meat and has been previously heated to the internal temperature of 74 °C (165 °F) (2, 5).

This temperature can effectively destroy most of the living pathogenic forms of microorganisms. Although reheating to the temperature of 74 °C cannot destroy spores present in the food, it will ensure the immediate consumption of the lasagna.

If the lasagna is then cooled down and stored in the refrigerator or freezer, it will require a new reheating procedure. Microorganisms can survive in refrigerated and frozen storage and develop during the refrigerator and freezing and thawing processes (5).

Therefore, as a safety recommendation, stored cooked or partially cooked foods should not be consumed before they are previously reheated (2, 5).


In this article, we answered the question “How to fix undercooked lasagna?” and discussed how to fix lasagna by different methods, why should you fix undercooked lasagna and whether you can eat an undercooked lasagna.

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