How To Cook Frozen Lasagna Faster & Speed Up Cooking Time!

How do you cook frozen lasagna faster? Cooking frozen lasagna faster is achievable by defrosting it before baking. Typically, frozen lasagna takes 90 minutes to cook, but defrosting reduces the time to approximately 60 minutes, saving you 30 minutes of cooking time. Enjoy a delicious meal more quickly by planning ahead and defrosting your lasagna.

Lasagna is a popular dish in many homes, often prepared in large quantities and frozen for later use. This convenient approach allows you to enjoy a delicious meal without spending extensive time on preparation.

However, cooking frozen lasagna can take a while, so it’s essential to plan the cooking time or find ways to cook it faster without compromising the dish’s quality.

In this guide, we will discuss how to cook frozen lasagna faster, drawing from my experience of being a chef!

How To Cook Frozen Lasagna Faster

Cooking frozen lasagna is both feasible and straightforward. If you prefer to cook it without thawing, that’s perfectly fine. Be prepared for a cooking time of up to 90 minutes if you plan to bake it from frozen.

On the other hand, cooking lasagna fresh or after thawing will still take around 60 minutes, so patience is required in either case. Bypassing the need to remember to defrost it can be convenient, though.

For larger lasagnas, it may take an extra 20 minutes to the cooking time. Cooking it in a convection oven can also speed up the process. A higher temperature is recommended to ensure the lasagna cooks thoroughly.

Cooking a defrosted lasagna in the oven. Credit: Unsplash
Cooking a defrosted lasagna in the oven. Credit: Unsplash

Simple steps on how to cook frozen lasagna faster:

  1. Take the lasagna out of the freezer and preheat your oven to 400 degrees Fahrenheit.
  2. Tightly cover the lasagna dish with foil. This allows the lasagna to cook and heat the frozen parts without burning the cheese.
  3. Bake the covered lasagna for approximately 60 to 75 minutes.
  4. Remove the foil and continue baking until the sauce is bubbly, and the cheese is melty and golden. This should take about 30 minutes.
  5. Allow it to cool, serve, and enjoy the delicious meal!

Keep in mind that if you’re using a glass dish for cooking the lasagna, ensure it’s freezer-to-oven safe to prevent damage.

If necessary, you can thaw it in the microwave beforehand.

Defrost Frozen Lasagna In The Microwave

If you didn’t remember to remove your frozen lasagna from the freezer the night before, you might still have the option to defrost it before reheating, depending on the packaging.

For homemade lasagna, take it out of its pan, place it in a microwave-safe dish, and use the appropriate defrost settings. If you plan to oven-bake your lasagna afterward, ensure the dish you use is oven-safe.

For defrosted homemade, pre-cooked lasagna that doesn’t need oven-baking, simply heat it in the microwave. Adding a bit of water on top and covering the dish will help maintain moisture as it reheats.

Some store-bought frozen lasagnas are designed for microwave defrosting and heating. For brands like Stouffer’s, follow the box instructions to achieve the best results. Typically, the film remains intact during defrosting but is pierced for reheating.

Avoid microwaving pre-made frozen lasagna in tinfoil or metal-based containers. These trays are designed for faster oven cooking due to the heat-conducting properties of tinfoil but are not microwave-safe.

Although some aluminum foils can be microwaved, it’s risky to do so unless you’re certain the metal won’t damage your microwave. Always exercise caution when using metal containers in the microwave.

Read also: How To Reheat Lasagna In The Microwave

How Long Does It Take A Frozen Lasagna To Bake?

Frozen lasagna is a popular food in America, partly because it’s satisfying and filling. Preparing lasagna from scratch is time-consuming, involving the creation and cooking of different sauces and, in some recipes, par-cooking lasagna sheets – and that’s not even counting the baking time!

Today, many people lack the time or desire to make lasagna from scratch, especially after a long day at work.

With a store-bought pre-made lasagna, the only time needed is for cooking it in the oven.

A typical 38 oz frozen lasagna requires approximately 75-90 minutes of cooking time when baked straight from the freezer in a conventional oven. Larger, family-sized lasagnas will take longer, usually needing an extra 20 minutes.

If defrosted beforehand, a 38 oz lasagna will take around 55-65 minutes to cook in a conventional oven at 350 degrees.

Baking a lasagna in the oven. Credit: Unsplash
Baking a lasagna in the oven. Credit: Unsplash

What Temperature Do You Cook A Frozen Lasagna?

Fresh lasagna is usually baked at temperatures ranging from 350 to 375 degrees. However, for frozen lasagna, it’s essential to follow the specific cooking times and temperatures listed on the packaging to achieve the best results.

When reheating leftover lasagna, it’s recommended to use a lower temperature of 200 degrees Fahrenheit, although the exact temperatures and times will typically be provided on the packaging. If you’ve defrosted your frozen lasagna, you may be able to reduce the cooking time by 20-30 minutes, depending on its size.

Larger and thicker lasagnas may require higher cooking temperatures to ensure all layers are heated thoroughly.

Avoid turning up the oven temperature to cook a frozen lasagna faster, as this can lead to a burnt and blackened exterior while the inside remains cold or even frozen.

To reduce the cooking time of frozen lasagna, consider defrosting it first or using a convection oven. These methods can potentially save you 20 minutes or more, allowing you to enjoy a scrumptious meal sooner.

Is Defrosting Frozen Lasagna Necessary Before Cooking?

As demonstrated earlier, it’s entirely possible to cook freezer lasagna without defrosting it beforehand.

Though freezing lasagna can make the cooking process quicker, defrosting it is not mandatory.

There are two options for defrosting your lasagna.

You can remove the lasagna from the freezer and place it in the refrigerator overnight. This is probably the easiest way to have your lasagna ready to cook and serve for dinner, without needing additional steps in the kitchen.

If your lasagna is stored in a glass dish, defrosting is crucial. The overnight defrosting method is the most suitable approach in this case.

Alternatively, you can use the microwave to defrost, as long as there’s no metal or foil in the dish.

When using the microwave’s defrost function, be sure to monitor the lasagna frequently, as you don’t want the microwave to start cooking the lasagna for you – that’s the oven’s job!


How Do You Cook A Frozen Lasagna Quickly?

To cook a frozen lasagna quickly, defrost it beforehand to reduce the cooking time. Preheat your oven and cover the lasagna with aluminum foil to retain moisture and even out the heat. A defrosted lasagna takes around 60 minutes to cook, saving 30 minutes compared to cooking it from frozen.

How Do You Speed Up Cooking Lasagna?

Speed up cooking lasagna by defrosting it before baking and preheating the oven. Cover the lasagna with foil for even heat distribution and moisture retention. Alternatively, you can divide the lasagna into smaller portions to decrease the cooking time further.

Can You Cook Frozen Cooked Lasagna Without Defrosting?

Yes, you can cook frozen cooked lasagna without defrosting. However, it will take longer to heat through compared to defrosted lasagna. Cover it with foil to ensure even heat distribution and moisture retention. The typical cooking time for frozen lasagna is around 90 minutes.

How Long Does It Take To Cook Frozen Lasagna?

Cooking frozen lasagna takes approximately 90 minutes in a preheated oven. However, if you defrost the lasagna beforehand, the cooking time reduces to around 60 minutes. Cover the lasagna with foil for even heat distribution and to retain moisture during the cooking process.


While there isn’t a magical shortcut to cooking frozen lasagna rapidly, certain strategies can streamline the process and ensure a smooth experience.

Anticipate a cooking time of approximately 90 minutes for a frozen lasagna, while thawed lasagna will take around 60 minutes to cook.

The most effective way to cook frozen lasagna faster is to defrost it prior to cooking. Ensure you remove it from the freezer the night before, or use the defrost setting on your microwave. Cooking it in a convection oven can speed up the process slightly.

Norah Clark

Norah Clark

Norah Clark, the founder and editor of YummyTasteFood! She's a seasoned food writer and editor with over a decade of experience in the hospitality industry as a former pastry chef, sous chef, and barista. When not writing about food, she explores new recipes or travels the world for culinary inspiration.

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