White Chicken Lasagna

My sister walked into the kitchen one rainy Sunday afternoon carrying a rotisserie chicken and a determined look on her face, announcing she was tired of red sauce lasagna and wanted something different. I had never made a white lasagna before, but her confidence in me was either flattering or dangerous. Three hours later we were scraping the baking dish clean with forks, standing over the sink, barely able to wait for it to cool properly.

That first attempt was messy and imperfect, the noodles tearing in places and the cheese browning unevenly, but nobody at the table cared even a little bit. My brother in law went back for thirds and then quietly packed a container to take home before anyone else could claim it.

Ingredients

• 2 cups cooked chicken, shredded: Rotisserie chicken saves time and adds extra flavor, but poached chicken works beautifully if you prefer a cleaner taste.
• 2 cups baby spinach, roughly chopped: Cutting the spinach prevents long stringy bites and helps it blend seamlessly into every layer.
• 1 cup mushrooms, thinly sliced: Cremini mushrooms add an earthy depth that pairs perfectly with the creamy white sauce.
• 1 medium onion, finely chopped: A yellow onion brings natural sweetness that balances the richness of all that dairy.
• 3 cloves garlic, minced: Fresh garlic only, because the jarred version simply cannot compete here.
• 2 cups ricotta cheese: Full fat ricotta creates the creamiest texture between the layers.
• 2 cups shredded mozzarella cheese: Whole milk mozzarella melts into those gorgeous stretchy cheese pulls everyone loves.
• 1 cup grated Parmesan cheese: This adds a salty, nutty punch that lifts the entire dish.
• 4 cups whole milk: Do not substitute skim milk, as the sauce needs the fat to thicken properly and taste luxurious.
• 4 tbsp unsalted butter: The foundation of your white sauce, so use good quality butter if you have it.
• 1/4 cup all-purpose flour: This is what transforms melted butter and milk into a thick, glossy sauce.
• 12 lasagna noodles: No boil noodles save a step, but regular noodles have a slightly sturdier bite that some people prefer.
• 1/2 tsp dried basil: A subtle herbal note that ties everything together without overpowering the cream.
• 1/2 tsp dried thyme: Thyme and chicken are a classic pairing that elevates this above a plain cheese bake.
• 1/2 tsp ground black pepper: Freshly cracked pepper makes a noticeable difference in the overall flavor.
• 1/2 tsp salt: Adjust slightly depending on how salty your cheese and chicken already are.
• 1/4 tsp freshly grated nutmeg: Optional but highly recommended, as it adds a warmth most people cannot quite identify but always love.
• 2 tbsp olive oil: Used for sautéing the vegetables until they are soft and fragrant.

Instructions

Preheat and prepare:

Set your oven to 375 degrees F and grease a 9 by 13 inch baking dish with butter or cooking spray so nothing sticks later.

Cook the noodles:

Boil the lasagna noodles according to the package directions until al dente, then drain them carefully and lay them flat on a clean surface so they do not tear or clump together.

Sauté the vegetables:

Heat olive oil in a large skillet over medium heat and cook the onion and mushrooms for about 4 minutes until softened, then add the garlic and spinach for another 2 minutes until everything smells incredible and the spinach has wilted down.

Season the chicken filling:

Stir the shredded chicken into the vegetable mixture along with the basil, thyme, pepper, and salt, then set the whole skillet aside so the flavors can mingle while you make the sauce.

Build the white sauce:

Melt the butter in a medium saucepan over medium heat, whisk in the flour and cook for one minute, then slowly pour in the milk while whisking constantly until the mixture is smooth and begins to simmer and thicken into a silky sauce. Stir in half a cup of Parmesan and the nutmeg, then remove from heat.

Layer the lasagna:

Spread a thin layer of white sauce on the bottom of your prepared dish, then arrange three noodles on top followed by half the chicken mixture, a third of the ricotta, a third of the mozzarella, and a quarter of the remaining sauce. Repeat the layers once more, then finish with a final layer of noodles topped with the remaining sauce, ricotta, mozzarella, and Parmesan.

Bake until golden:

Cover tightly with foil and bake for 30 minutes, then remove the foil and continue baking for another 15 minutes until the top is gloriously golden and the edges are bubbling.

Rest and serve:

Let the lasagna rest for at least 10 to 15 minutes before slicing, because cutting too early will cause the layers to slide apart and all that beautiful assembly work will end up looking like a delicious mess.

Save

I brought this to a potluck once and a woman I had never met tracked me down at the dessert table just to ask for the recipe, which honestly felt better than any culinary school diploma could.

Making It Your Own

Sun dried tomatoes tucked into the chicken layer add a bright tangy contrast that cuts through the richness in the most satisfying way. Roasted red peppers do something similar while bringing a gentle smokiness that makes the whole dish feel a little more sophisticated with almost no extra effort.

A Note on the Sauce

Whisking the milk into the butter and flour gradually is the single most important step in this entire recipe, and rushing it will leave you with lumps that no amount of stirring can fix. Pour slowly and steadily while whisking with confidence, and the sauce will reward you with a silky smoothness that feels almost magical.

Serving and Storing

This lasagna tastes even better the second day once the flavors have had time to settle and deepen together overnight in the fridge. A glass of crisp Pinot Grigio alongside it turns a regular weeknight dinner into something that feels like a proper occasion.

• Store leftovers covered in the refrigerator for up to four days.
• Reheat individual portions in the microwave at half power to keep the sauce from separating.
• Frozen portions keep well for up to three months when wrapped tightly in foil and stored in an airtight container.

Save

Some recipes become staples because they are easy, and others earn their spot because they make people close their eyes and smile after the first bite. This white chicken lasagna manages to do both, and that is why it stays in my rotation year round.

Recipe FAQs

→ Can I use no-boil lasagna noodles?

Yes, no-boil noodles work perfectly and save time. Just make sure your white sauce is slightly thinner than usual so the noodles have enough moisture to soften during baking.

→ What can I substitute for rotisserie chicken?

You can use leftover cooked turkey, poached chicken breasts, or even store-bought grilled chicken strips. Any pre-cooked, shredded poultry will work well in this dish.

→ How do I prevent the lasagna from being watery?

Make sure to drain the noodles well after cooking, and cook the spinach until all moisture evaporates. Letting the assembled dish rest for 10–15 minutes after baking also helps it set properly before slicing.

→ Can I assemble this ahead of time?

Absolutely. You can assemble the entire dish up to 24 hours in advance, cover tightly, and refrigerate. Add an extra 10–15 minutes to the covered baking time if going straight from the fridge to the oven.

→ What wine pairs well with white chicken lasagna?

A crisp Pinot Grigio or a lightly oaked Chardonnay complements the creamy sauce and cheese beautifully. For a red option, a light Pinot Noir works well without overpowering the dish.

→ Can I freeze leftovers?

Yes, this dish freezes well. Cut into individual portions, wrap tightly in foil, and store in an airtight container for up to 3 months. Reheat in the oven at 350°F until warmed through.