Chicken and Spinach Casserole

I’ve always believed that the best meals are the ones that wrap you in a warm hug, and this Creamy Chicken and Spinach Casserole does exactly that. It’s my go-to recipe for those busy weeknights when I crave something deeply comforting without spending hours in the kitchen. The aroma of garlic, cheese, and herbs bubbling away in the oven instantly fills my home with a sense of warmth and anticipation. It reminds me of my other cozy favorites, like this incredible meatball casserole, but there’s a unique elegance to this chicken and spinach version that I just adore.

What Makes This Chicken and Spinach Casserole So Special?

For me, the magic of this dish lies in its simplicity and speed. With just 20 minutes of prep and 30 minutes to bake, I can have a wholesome, gourmet-tasting meal on the table in under an hour. I love how basic ingredients like milk, cream cheese, and Parmesan transform into a luxuriously creamy sauce that perfectly coats every piece of pasta, chicken, and spinach. This Chicken and Spinach Casserole is a testament to how simple, well-chosen ingredients can create something truly spectacular.

Ingredient Notes for Chicken and Spinach Casserole

I always opt for full-fat cream cheese to create that signature ultra-rich sauce. Using pre-cooked or rotisserie chicken is my favorite time-saver! Much like how the right sausage is key in my biscuits and gravy breakfast casserole, using quality cooked chicken makes all the difference in this delicious Chicken and Spinach Casserole.

Sofia

Creamy Chicken and Spinach Casserole

A rich and comforting casserole packed with tender chicken, fresh spinach, and pasta, all baked in a creamy three-cheese sauce with a crispy Panko topping.

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Prep Time 20 minutes mins

Cook Time 30 minutes mins

Total Time 50 minutes mins

Servings: 6 servings

Course: Main Course

Cuisine: American

Calories: 562

Ingredients Equipment Method Notes

Ingredients

  

For the Casserole

• 8 oz Penne pasta or other short pasta like rotini or ziti
• 1 tbsp Olive oil
• 1 medium Yellow onion finely chopped
• 3 cloves Garlic minced
• 10 oz Fresh spinach roughly chopped
• 3 cups Cooked chicken shredded or cubed (about 1 rotisserie chicken)
• 4 tbsp Unsalted butter
• 1/4 cup All-purpose flour
• 2 cups Milk whole or 2%
• 4 oz Cream cheese softened and cut into chunks
• 1 cup Shredded mozzarella cheese
• 1/2 cup Grated Parmesan cheese plus more for topping
• 1/2 tsp Salt or to taste
• 1/4 tsp Black pepper freshly ground
• 1/8 tsp Nutmeg freshly grated, optional

For the Topping

• 3/4 cup Panko breadcrumbs
• 1/4 cup Grated Parmesan cheese
• 2 tbsp Unsalted butter melted

Equipment

• 9x13 inch Casserole Dish
• Large pot or Dutch oven
• Large Skillet
• Mixing Bowls

Method

 

Preparation

• Preheat your oven to 375°F (190°C). Lightly grease a 9x13 inch casserole dish.
• Cook the pasta according to package directions until al dente. Drain well and set aside.

Sauté Vegetables and Make Sauce

• While the pasta is cooking, heat the olive oil in a large skillet or pot over medium heat. Add the chopped onion and cook until softened, about 5-6 minutes. Add the minced garlic and cook for another minute until fragrant.
• Add the fresh spinach to the skillet in batches, stirring until it has completely wilted down. Remove the onion and spinach mixture from the skillet and set aside. Squeeze out any excess liquid from the spinach.
• In the same skillet, melt 4 tablespoons of butter over medium heat. Whisk in the flour and cook for 1 minute, stirring constantly, to form a roux.
• Gradually whisk in the milk until the mixture is smooth. Bring to a simmer and cook for 2-3 minutes, stirring, until the sauce has thickened. Reduce heat to low.
• Stir in the softened cream cheese until it has completely melted. Add the shredded mozzarella and 1/2 cup of Parmesan cheese. Continue stirring until all the cheese is melted and the sauce is creamy. Season with salt, pepper, and nutmeg.

Assemble and Bake

• To the pot with the cheese sauce, add the cooked pasta, shredded chicken, and the cooked onion-spinach mixture. Stir gently until everything is evenly coated.
• Pour the mixture into the prepared casserole dish and spread it into an even layer.
• In a small bowl, combine the Panko breadcrumbs, 1/4 cup of Parmesan cheese, and 2 tablespoons of melted butter. Mix until the breadcrumbs are evenly moistened. Sprinkle the topping evenly over the casserole.
• Bake uncovered for 15-20 minutes, or until the sauce is bubbly and the topping is golden brown.
• Remove from the oven and let the casserole rest for 5-10 minutes before serving. This allows the sauce to set slightly.

Notes

Using Frozen Spinach: You can substitute 10 oz of frozen chopped spinach. Thaw it completely and squeeze out as much water as possible before adding it with the cooked onions. Squeezing it dry is crucial to prevent a watery casserole.
Make-Ahead Tip: Assemble the casserole without the topping, cover, and refrigerate for up to 24 hours. When ready to bake, add the topping and increase the baking time to 25-30 minutes, or until heated through.
Storage: Store leftovers in an airtight container in the refrigerator for up to 3-4 days.

How I Make Chicken and Spinach Casserole

I start by sautéing the onion and garlic until they’re fragrant, then I wilt in the fresh spinach. The heart of the dish is the sauce, which I make by creating a simple roux with butter and flour, then whisking in milk until it’s smooth. After melting in the cream cheese, mozzarella, and Parmesan, I combine this glorious sauce with the cooked penne and chicken. I pour everything into a baking dish, top it with a buttery Panko-Parmesan crust, and bake until it’s golden and bubbly.

My Tips for the Perfect Outcome

• Slightly undercook your pasta, as it will continue cooking in the oven.
• Use freshly grated Parmesan and mozzarella for the smoothest, meltiest sauce.
• Don’t skip the nutmeg! A tiny pinch truly elevates the flavor of the cream sauce.

How I Serve and Store This Dish

I love serving this casserole piping hot from the oven with a simple side salad or some crusty garlic bread to soak up any extra sauce. It’s a complete meal on its own, which is part of its charm. For leftovers, I store them in an airtight container in the refrigerator for up to three days. It reheats beautifully in the microwave or oven, making it perfect for a quick and satisfying lunch the next day.

Can I use frozen spinach instead of fresh?

Absolutely! I’ve done this in a pinch. Just be sure to thaw the frozen spinach completely and squeeze out as much water as possible before adding it to the skillet. This crucial step prevents your final Chicken and Spinach Casserole from becoming watery and ensures the sauce stays rich and creamy.

Can this casserole be made ahead of time?

Yes, this is one of my favorite make-ahead meals. You can assemble the entire casserole without the Panko topping, cover it tightly, and refrigerate it for up to 24 hours. When you’re ready to eat, simply sprinkle the topping over it and bake as directed, adding a few extra minutes to the cooking time.

What other types of pasta can I use?

While I love penne, this Chicken and Spinach Casserole is very forgiving. Any short, sturdy pasta with ridges or curves to hold the creamy sauce will work beautifully. I’ve had great success with rotini, ziti, and even medium shells. Just cook it al dente according to the package directions.

Is this Chicken and Spinach Casserole freezer-friendly?

Yes, it freezes quite well. For the best results, I recommend freezing the assembled casserole before baking it, and without the breadcrumb topping. Thaw it overnight in the refrigerator, then add the fresh topping just before baking. This helps maintain the perfect creamy texture of the sauce and the crispy topping.

This recipe holds a special place in my heart, and I truly hope it brings as much joy to your table as it does to mine. If you try it, I’d absolutely love to hear what you think and see your creations in the comments below!

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