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Creamy Chicken and Spinach Casserole with Cheese

by Jennah
written by Jennah

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This Chicken and Spinach Casserole is the ultimate weeknight comfort meal. Tender shredded chicken, fresh spinach, and a creamy blend of cheeses come together in a luscious casserole that’s both satisfying and simple to make. It’s perfect for family dinners, meal prep, or even potlucks, giving you all the rich flavors of a cheesy, creamy dish with minimal effort.

The first time I made this casserole, my husband insisted I make it again the very next week. Our kids couldn’t get enough of the cheesy, creamy chicken and the hint of garlic in the spinach mixture. It’s now a staple in our household for busy weeknights—comforting, filling, and always disappearing from the plate before I have a chance to take a second bite!

Why This Chicken and Spinach Casserole Stands Out

  • Creamy and cheesy goodness: Combines sour cream, cream cheese, and shredded cheeses for a rich, indulgent flavor.

  • Quick weeknight meal: Uses shredded chicken for speed and convenience.

  • Versatile and customizable: Add mushrooms, sun-dried tomatoes, or a touch of hot sauce for a twist.

  • Easy for leftovers: Reheats beautifully for lunches or second dinners.

  • Optional crunch topping: Breadcrumbs create a golden, crispy finish.

Ingredients

  • 4 boneless, skinless chicken breasts, cooked and shredded (about 1 lb / 454 g)

  • 4 cups fresh spinach, chopped (120 g / 0.26 lb)

  • 1 cup sour cream or Greek yogurt (240 g / 0.53 lb)

  • 1 cup shredded cheese (cheddar, mozzarella, or a mix) (113 g / 0.25 lb)

  • ½ cup grated Parmesan cheese (50 g / 0.11 lb)

  • 1 cup cream of mushroom soup or homemade béchamel (240 g / 0.53 lb)

  • 3 cloves garlic, minced (9 g)

  • 1 tsp Italian seasoning

  • Salt and black pepper, to taste

  • 1 tbsp olive oil (15 ml)

  • 1 cup breadcrumbs (optional, for topping) (100 g / 0.22 lb)

Directions 

Prepare the Chicken

  1. Cook the chicken breasts in a skillet or oven until fully cooked. Once slightly cooled, shred into bite-sized pieces. For a shortcut, rotisserie chicken works perfectly.

Make the Creamy Base

  1. In a large mixing bowl, whisk together the sour cream, cream of mushroom soup, minced garlic, Italian seasoning, salt, and pepper until smooth.

  2. Stir in the shredded cheese and Parmesan to create a rich, cheesy mixture.

Cook the Spinach

  1. Heat olive oil in a skillet over medium heat. Add the chopped spinach and sauté until wilted, about 2–3 minutes.

Assemble the Casserole

  1. Fold the cooked spinach and shredded chicken into the creamy cheese mixture until everything is evenly combined.

  2. Preheat your oven to 375°F (190°C). Pour the mixture into a greased casserole dish. If using, sprinkle breadcrumbs evenly on top for added texture.

Bake

  1. Bake uncovered for 20–25 minutes, until the top is golden and bubbly. Remove from the oven and let rest for a few minutes before serving.

Notes & Tips

  • Add flavor variations: Include mushrooms, sun-dried tomatoes, or a splash of hot sauce for extra depth.

  • Low-carb option: Serve over cauliflower rice or zucchini noodles instead of breadcrumbs.

  • Storage: Refrigerate leftovers in an airtight container for up to 3 days. Reheat in the microwave or oven at 350°F until warmed. Avoid freezing to maintain texture.

  • Cheese options: Mix and match cheddar, mozzarella, or even pepper jack for a different flavor profile.

  • Serving suggestions: Pairs perfectly with garlic toast, crusty bread, or a side of steamed rice.

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