While making lasagna entirely from scratch is immensely rewarding, it also requires a lot of time and effort. That’s where Costco’s take-and-bake lasagnas come in! With a few simple steps, you can transform their frozen lasagna into a bubbling, delectable masterpiece that tastes just like homemade.

Costco offers both meat and vegetarian lasagna varieties that come pre-assembled with layers of pasta, rico a cheese, mozzarella, and either a meat or vegetable sauce. All you have to do is bake it according to the instructions. Lasagna has never been so easy! Here’s your guide for how to cook the perfect Costco lasagna every time.

1. How To Cook Costco Lasagna

What You’ll Need

  • 1 Costco frozen meat or veggie lasagna
  • Aluminum foil
  • Baking sheet
  • Spatula or lasagna server


Preheat your oven to 375°F. This is the ideal temperature for heating the lasagna through while developing a beautiful baked cheese topping without drying it out.

Remove the frozen lasagna from all packaging and place it directly into an oven-safe baking dish or the aluminum tray it comes in. Cover tightly with a layer of aluminum foil.

Place the foil-covered lasagna on a baking sheet to catch any drips or spills as it cooks. The baking sheet also makes it easier to transfer in and out of the oven.

Bake the lasagna for 70 minutes covered with the foil. This initial baking time allows the lasagna to slowly heat through from the frozen state.

After 70 minutes, carefully remove the foil. You’ll see the cheese has melted but the top won’t be browned yet.

Return the lasagna to the oven uncovered and bake for an additional 10-15 minutes. This allows the cheese topping to turn a beautiful golden brown color.

Remove the bubbling hot lasagna from the oven and let it rest for 10-15 minutes before serving. This allows it to set up for cleaner slicing.

Using a lasagna server or flat spatula, portion out hearty squares onto plates and get ready to enjoy a delicious Italian feast!

Tips for the Best Lasagna

  • Don’t peek by removing the foil before 70 minutes or you’ll lose steam.
  • Let the lasagna rest for 15 minutes to allow it to fully set before slicing.
  • For an extra cheesy lasagna, top with shredded mozzarella during the last 5 minutes of baking.
  • Add a sprinkle of dried herbs or red pepper flakes over the top for a flavor boost.
  • Let lasagna sit on the counter for 30 minutes before baking for even cooking.
  • Reheat any leftovers in the oven rather than microwave for best texture.

With its decadent layers of noodles, rich tomato or veggie sauce, and perfectly melty cheeses, Costco’s take-and-bake lasagna truly satisfies those Italian food cravings. It’s hearty, comforting, and couldn’t be easier to prepare at home. Simply bake according to these simple instructions for a lasagna so delicious, no one will believe it came from the freezer aisle!

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julia jane

Julia Jane is a home cook inspired by her mother's cooking. With the desire to share my cooking experiences with everyone, she created this website

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