Costco Lasagna Cooking Instructions: It’s delicious!

Costco Lasagna Cooking Instructions: It's delicious!

How to cook Costco lasagna is a question that many Costo fanatics have debated. Some say you should bake it; some say you should microwave it. 

So what’s the right way to cook Costco lasagna? Turns out there is no wrong way! Just follow these simple instructions, and you’ll have a delicious lasagna!

Lasagna is a dish that originates from Italy and consists of wide, flat noodles layered with cheese and sauce, typically meat-based. It is a popular dish in many parts of the world and can be made with various ingredients.

What is the cooking time for Costco’s lasagna?

Costco's lasagna

If you were wondering, the cooking time for Costco’s lasagna is a whopping 12 minutes. That’s right, 12 minutes.

For those of you who are math-challenged, it takes twice as long to cook the lasagna as it does to read the instructions on the box. And for those of you who are unfamiliar with lasagna, it’s a dish that traditionally takes hours to prepare. So how does Costco do it? 

The answer, my friends, is science. Or, more specifically, a process called flash freezing. By quickly freezing the lasagna after it’s assembled, Costco can cook it a fraction of the time.

So next time you’re short on time but still craving some Italian cuisine, pick up a box of Costco’s lasagna. It might not be traditional, but it’s delicious all the same.

How long does it take to cook Costco’s frozen lasagna?

For anyone who has ever found themselves standing in front of the freezer section at Costco, trying to decide whether to buy the chicken or the lasagna, here is a helpful tip: both items take approximately the same amount of time to cook.

According to the cooking instructions on the lasagna package, it should be heated for about an hour and a half. On the other hand, the chicken only needs to be heated for an hour. 

So if you’re ever in a predicament where you can’t decide which frozen item to buy at Costco, remember that they’ll both take about the same amount of time to cook. And if you’re really in a hurry, you could always just get both and have a delicious, home-cooked meal in no time.

Costco Lasagna Cooking Instructions: It's delicious!

Costco Lasagna Cooking Instructions

Want to try a simple but delicious lasagna? Then follow the Costco lasagna cooking instructions below!
4.5 from 2 votes
Prep Time 15 mins
Cook Time 45 mins
Resting Time 10 mins
Servings 4 Servings


  • 9x13 Baking dish


  • 1 box Costco lasagna
  • 1 jar Pasta sauce
  • 1 bag Shredded mozzarella cheese
  • 1 package Ground beef
  • 1 container Ricotta cheese
  • 1 Egg
  • 1 tbsp Parsley
  • 1 tbsp Italian seasoning
  • Salt and pepper


  • Preheat the oven to 375 degrees.
  • In a large pot, brown the ground beef and drain any excess grease.
  • Add in the pasta sauce and simmer.
  • In a bowl, mix the ricotta cheese, egg, parsley, and Italian seasoning. Season with salt and pepper to taste.
  • To assemble, spread a layer of the meat sauce on the bottom of a 9x13 baking dish.
  • Top with a layer of lasagna noodles, followed by a layer of the ricotta cheese mixture. Top with another layer of noodles, and then sprinkle with mozzarella cheese.
  • Repeat layering until all ingredients are used up.
  • Cover with foil and bake for 45 minutes. Remove foil and bake for 15 minutes, or until cheese is melted and bubbly.
  • Let lasagna rest for 10 minutes before serving.
  • Enjoy!
Tried this recipe?Let us know how it was!

Things to take care of while storing this recipe

  1. If you make this recipe ahead of time, it can be stored in the fridge for up to 3 days.
  2. To freeze, assemble the lasagna according to instructions but do not bake. Wrap tightly with foil and place in the freezer for up to 2 months.
  3. When ready to bake, thaw in the fridge overnight and bake as directed.
  4. If you have leftovers, they can be stored in the fridge for up to 4 days.

And finally, this recipe can also be portioned out and frozen in individual containers for easy grab-and-go meals. Follow all these tips if you want to store it.

Is this recipe good for chicken and beef lasagna?

This recipe should work for both chicken and beef lasagna. If you’re using chicken, you may want to cook it before adding it to the sauce. Otherwise, follow the recipe as written.

Can I add or replace some ingredients in this recipe?

Yes, you can add or replace some ingredients in this recipe.

For example, you could use a different type of cheese in the ricotta cheese mixture or a different type of pasta sauce. You could also add vegetables to the lasagna, such as chopped spinach or mushrooms.

Tips and tricks for a better lasagna from Costco

Ready-to-eat lasagna

1) Preheat your oven to the specified temperature before cooking the lasagna. This will help ensure that it cooks evenly.

2) Cook the lasagna noodles according to the package directions before assembling the dish. This will help them cook evenly and prevent them from sticking together.

3) Use a meat sauce for the lasagna instead of a tomato-based sauce. This will add more flavor to the dish.

4) Add a layer of vegetables, such as chopped spinach or mushrooms, between the noodles and meat sauce. This will add more flavor and nutrition to the dish.

5) Use ricotta cheese instead of mozzarella cheese in the lasagna. Ricotta is higher in protein and lowers in fat, making it a healthier option.

6) Use whole wheat lasagna noodles instead of white noodles. Whole wheat noodles are higher in fiber and nutrients than white noodles.

7) Add a layer of cooked ground beef or sausage to the lasagna. This will add more protein and flavor to the dish.

8) Thaw in the refrigerator overnight before reheating.

9) Bake the lasagna uncovered to get nice, and brown the cheese on top. This will give the lasagna a more appealing appearance.

10) Let the lasagna rest for 10 minutes before serving. This will allow the dish to firm up and makes it easier to cut into neat slices.

11) Serve the lasagna with a salad or breadsticks for a complete meal.

12) Store leftover lasagna in the refrigerator for up to three days.

13) Reheat leftover lasagna in the microwave or oven before serving.

And finally, try different variations of lasagna, such as chicken lasagna or vegetable lasagna. Be creative and experiment with different ingredients to find a combination that you and your family enjoy!

Things to serve with this recipe

Green salad for side dish

Green salad: A simple green salad goes great with any Italian dish!

Roasted vegetables: Roasted veggies are a healthy and delicious side dish. Try this recipe!

Fruit salad: A fruity salad is a great way to balance out a heavier meal.  A light and refreshing salad is the perfect counterpart to a hearty lasagna Try this recipe!

Breadsticks: Breadsticks are the perfect way to soak up all that delicious sauce!

Wine: Red wine is a classic pairing with Italian food. Try this bottle! Soda is always a good choice if you’re looking for a non-alcoholic option. Try this recipe!

Caesar salad: A classic Caesar salad is a great way to start your meal. Try this recipe!

Final Words

This recipe for lasagna from Costco is a delicious and easy way to feed a large crowd. It is perfect for potlucks, parties, and family gatherings. The lasagna can be made ahead of time and reheated when you’re ready to serve it. This dish is sure to be a hit with everyone who tries it!

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