Dinner · Part 2 of 3: Instructions
Classic Cheesy Beef Lasagna Bake Step-by-step instructions

- Prep
- Cook
- Total
- Serves
- 8
Before you start
Before you begin, ensure you have all your ingredients measured and ready. Preheat your oven to 375°F (190°C) so it is ready when the lasagna is assembled. Cook your lasagna noodles in a large pot of salted boiling water according to the package directions, aiming for al dente so they maintain their texture.
Drain the noodles and lay them flat on a piece of parchment paper to prevent them from sticking together while you prepare the meat sauce. Having everything organized will make the assembly process smooth.
Ingredients at a glance (4)
- 1 lb ground beef
- 24 oz marinara sauce
- 9 pieces lasagna noodles, cooked
- 3 cups shredded mozzarella cheese
Instructions
Preparing the meat sauce
- Prepare the meat sauceHeat a large skillet over medium-high heat. Add the ground beef and cook, breaking it up with a spoon, until it is fully browned and no longer pink. Ensure the internal temperature reaches at least 160°F (71°C) to ensure it is cooked through. Drain any excess fat from the skillet. Stir in the marinara sauce and simmer gently for five minutes to allow the flavors to meld together perfectly.Look for The sauce should be bubbling and thick, with the beef fully browned throughout.Safe temperature 160°F (71°C) internal temperature (ground meat)Tip Adding a splash of water or broth to the sauce can help keep the noodles hydrated during the long baking process.
The meat sauce is ready when the ground beef is fully browned and the marinara sauce has thickened slightly. It should smell fragrant and savory, with the tomatoes and meat well-integrated. Ensure the beef has reached a safe internal temperature of 160°F (71°C). Check the consistency: it should be thick enough to coat the back of a spoon without being overly watery, as this will help the final lasagna maintain its structure during the baking process.
Assembling the layers
- Layer the lasagnaSpread a small amount of the prepared meat sauce on the bottom of a 9x13 inch glass baking dish to prevent sticking. Place a layer of three cooked lasagna noodles over the sauce. Top the noodles with a portion of the meat sauce and a generous sprinkle of shredded mozzarella cheese. Repeat these layers until all ingredients are used, finishing with a final, thick layer of mozzarella cheese on the very top.Look for The dish should be filled to the top, with cheese covering every inch of the surface.Tip Ensure the noodles overlap slightly to create a cohesive structure that holds together when you slice and serve the finished lasagna.
The lasagna is ready for the oven when the layers are neatly stacked and the top is completely covered in a generous amount of mozzarella cheese. Ensure that the edges of the noodles are not extending too far beyond the sauce to prevent them from drying out or burning.
The dish should feel heavy and well-packed. Check that the corners of the baking dish are properly covered with sauce to prevent the bottom layer of noodles from sticking or scorching during the bake.
Baking to perfection
- Bake and servePreheat your oven to 375°F (190°C). Cover the baking dish with foil and bake for 25 minutes. Remove the foil and bake for an additional 15 to 20 minutes, or until the cheese is bubbling and golden brown on top. Remove from the oven and let it rest for at least 15 minutes before cutting into it. This resting period is crucial as it allows the layers to set, ensuring a clean and beautiful slice every single time.Look for The cheese should be melted, bubbling, and slightly browned around the edges of the dish.Tip If the cheese is not browning enough after removing the foil, turn on the broiler for one to two minutes, watching closely to prevent burning.
The lasagna is finished when the top is golden brown and the cheese is bubbling vigorously across the entire surface. The aroma should be rich and savory. A knife inserted into the center should meet little resistance, indicating the noodles are tender. Once you remove it from the oven, let it stand on a cooling rack for at least 15 minutes before attempting to serve. This is the final, crucial step to ensure each slice is beautiful and easy to remove.
Common mistakes
Avoid overcooking the noodles during the initial boiling stage, as they will soften further in the oven. If they are too soft initially, they will become mushy after baking. Another common mistake is failing to drain the fat from the ground beef; excess fat can make the sauce greasy and prevent the layers from bonding properly.
Finally, do not skip the resting period. If you cut into the lasagna immediately after taking it out of the oven, the layers will slide apart and the sauce will run everywhere.
How to tell it’s done
The lasagna is done when the internal temperature of the center reaches a consistent heat and the cheese on top is fully melted, bubbling, and slightly golden brown. Use a probe thermometer to check the center if you are unsure.
The edges should be pulling away slightly from the sides of the baking dish, and the sauce should be thick and rich. Letting the lasagna rest for at least 15 minutes is mandatory, as it allows the layers to firm up, ensuring the slice holds its shape.
- Ground meat: 160°F (71°C) in the thickest part
Up next · Part 3 of 3
2 variations · storage & make-ahead · 3 answers · printable card
Tips, FAQ & printable recipe (Part 3)← Back to the ingredients (Part 1)