Chicken Spaghetti Lasagna Bake Step-by-step instructions

Before you start

Before starting the cooking process, organize all ingredients and equipment to ensure a smooth, efficient workflow. Measure out the spaghetti, chicken broth, and cheeses. Bring the cream cheese to room temperature so it melts smoothly into the sauce without clumping.

Preheat the oven to 375°F (190°C) and prepare a 9x13-inch glass baking dish. Having everything prepared and within arm's reach prevents overcooking the pasta or scorching the delicate cream cheese sauce.

Instructions

Preparing the Pasta and Chicken

1. 1Cook the Spaghetti
   Bring a large pot of water to a boil. Add the spaghetti pasta and cook according to the package instructions until just al dente, ensuring it remains slightly firm. Drain the pasta thoroughly and set it aside.
   Look for The pasta should be flexible but still have a slight bite in the center.
   Tip Do not overcook the pasta, as it will continue cooking in the oven later.
2. 2Poach and Shred the Chicken
   In a large skillet, bring the chicken broth to a simmer over medium heat. Add the raw chicken breasts, cover the skillet, and cook for 10 to 12 minutes, or until the internal temperature reaches 165°F (74°C). Remove the chicken from the skillet, let it rest for 5 minutes, and then shred it using two forks, keeping the broth in the skillet.
   Look for The chicken should be opaque throughout and register 165°F (74°C) on a thermometer.
   Safe temperature 165°F (74°C) internal temperature (poultry)
   Tip Letting the chicken rest before shredding keeps the meat incredibly juicy.

The spaghetti should be drained and slightly firm, and the chicken breasts must be poached in the broth until fully cooked to an internal temperature of 165°F (74°C), then easily shredded into bite-sized pieces using two forks.

Making the Creamy Sauce and Assembling

3. 3Prepare the Creamy Sauce
   With the skillet over low heat, add the softened cream cheese directly into the warm chicken broth. Whisk constantly until the cream cheese is fully melted and the sauce is completely smooth. Stir in the grated parmesan cheese until fully incorporated.
   Look for The sauce should be thick, smooth, and free of any cream cheese lumps.
   Tip Keep the heat low to prevent the cream cheese and dairy from separating.
4. 4Assemble the Pasta Bake
   Preheat the oven to 375°F (190°C). Combine the drained spaghetti, shredded chicken, and the creamy sauce directly in the skillet or in a large bowl. Toss everything thoroughly until the pasta is completely coated. Transfer the mixture into a 9x13-inch glass baking dish, spreading it into an even layer.
   Look for The pasta and chicken should be evenly distributed and thoroughly coated in sauce.
   Tip Using a glass dish allows you to monitor the browning on the sides as it bakes.

The sauce must be completely smooth, velvety, and thick enough to coat the back of a spoon, with the cooked spaghetti and shredded chicken thoroughly tossed and evenly distributed throughout the mixture in the baking dish.

Baking and Garnishing

5. 5Bake the Casserole
   Sprinkle the shredded mozzarella cheese evenly over the top of the pasta mixture. Place the baking dish in the preheated oven and bake at 375°F (190°C) for 20 minutes, or until the mozzarella is melted, bubbling, and golden brown.
   Look for The cheese should be completely melted, bubbling vigorously, and golden-brown in spots.
   Tip Watch the casserole closely during the last few minutes to ensure the cheese does not burn.
6. 6Garnish and Serve
   Remove the hot glass baking dish from the oven. Sprinkle the finely chopped fresh parsley over the bubbling cheese layer. Allow the casserole to rest for 10 minutes to set before slicing and serving with a sturdy spatula.
   Look for The steam should rise gently, and the fresh parsley should look bright green against the melted cheese.
   Tip Resting the casserole prevents the creamy sauce from running when sliced.

The casserole is ready when the mozzarella cheese on top is completely melted, bubbling vigorously around the edges, and speckled with beautiful golden-brown patches, finished with a bright green sprinkle of fresh parsley.

Common mistakes

One of the most common mistakes when making this casserole is overcooking the spaghetti during the initial boil. Because the pasta undergoes a second cooking phase in the oven, boiling it fully soft beforehand will result in a mushy, structureless dish.

Another error is failing to let the cream cheese soften properly before adding it to the skillet, which leads to a lumpy, separated sauce.

Finally, avoid using pre-shredded mozzarella, as it will not achieve that dramatic, stretchy cheese pull shown in the video; freshly grated cheese is essential for the perfect melt.

How to tell it’s done

Determining the doneness of this dish involves two critical checks. First, ensure the chicken is cooked to a safe internal temperature of 165°F (74°C) using a digital meat thermometer inserted into the thickest part of the breast before shredding.

Second, the final baked casserole is done when the cheese is completely melted and bubbling hot throughout, with the top layer showing a beautiful golden-brown color. Let the dish sit for 10 minutes after removing it from the oven to allow the creamy sauce to set slightly before slicing and serving.

• Poultry: 165°F (74°C) in the thickest part