Spinach Artichoke Chicken Casserole

The first time I made this casserole, I was trying to clean out my fridge after a weekend meal prep session. I had leftover rotisserie chicken, a half-used container of Greek yogurt, and those artichoke hearts I'd bought on impulse. My husband walked through the door while it was baking, stopped dead in his tracks, and asked what smelled so incredible. That's when I knew this accidental creation was staying in the regular rotation.

Last winter, my sister came over feeling completely burned out from work. I popped this casserole in the oven while we caught up on the couch. Something about the bubbling cheese and warm, comforting aroma made her shoulders actually drop. She asked for the recipe before she even finished her first serving, and now she makes it for her family every Sunday.

Ingredients

• 3 cups cooked chicken breast: Rotisserie chicken works perfectly here, or bake some breasts ahead of time
• 1 cup plain Greek yogurt: Non-fat or 2% creates the creamy base without the heaviness of sour cream
• 4 oz reduced-fat cream cheese: Soften this at room temperature so it blends smoothly into the mixture
• 1 cup shredded mozzarella cheese: Reserve half for the filling and half for that golden, bubbly top
• 1/2 cup grated Parmesan cheese: This adds a salty, nutty depth that pulls everything together
• 2 cups fresh baby spinach: Roughly chop it so it distributes evenly throughout
• 1 can artichoke hearts: Drain and chop these into bite-sized pieces
• 1 small yellow onion: Finely dice so it practically disappears into the casserole
• 2 cloves garlic: Minced fresh garlic makes all the difference here
• 1 tsp dried Italian herbs: Oregano, basil, and thyme blend works beautifully
• 1/2 tsp black pepper and 1/4 tsp salt: Adjust based on whether your chicken was pre-seasoned
• 1/4 tsp crushed red pepper flakes: Totally optional, but adds just enough warmth
• Olive oil spray: For greasing the pan and sautéing the vegetables
• Fresh parsley: A bright finishing touch that makes everything look pulled together

Instructions

Preheat and prep your baking dish:

Set your oven to 375°F and lightly grease a 9x13-inch baking dish with olive oil spray

Sauté the aromatics:

Heat olive oil in a large skillet over medium heat, cook the diced onion for 2-3 minutes until softened, then add garlic for 30 seconds until fragrant

Wilt the spinach:

Stir in chopped spinach and cook for 1-2 minutes until just barely wilted, then remove from heat

Mix the filling:

In a large bowl, combine chicken, artichokes, the onion-spinach mixture, Greek yogurt, cream cheese, half the mozzarella, all the Parmesan, and seasonings

Assemble and top:

Transfer everything to your prepared baking dish and spread it evenly, then sprinkle the remaining mozzarella across the top

Bake until golden:

Cook for 30-35 minutes until you see bubbling around the edges and gorgeous golden-brown spots on the cheese

Rest before serving:

Let the casserole sit for 5 minutes so it sets up slightly, then garnish with fresh parsley

Pin it

This casserole became my go-to for new parents and anyone recovering from surgery. It freezes beautifully uncooked, so I often make two and stash one in the freezer for those nights when cooking feels impossible. My friend texted me once saying it saved her during a particularly chaotic week with three kids under five.

Make Ahead Magic

I've learned through trial and error that you can assemble this entire casserole up to 24 hours before baking. Just cover it tightly and keep it in the refrigerator, then add 5-10 minutes to the baking time since it will be cold. The flavors actually meld together even better this way.

Cheese Swaps That Work

While mozzarella creates that classic melt, I've found that provolone adds a smoky depth that's incredible. Part-skim cheddar makes it feel more like a comfort food classic. Just stick to the same amounts so the texture stays consistent.

Serving Ideas

A simple arugula salad with lemon vinaigrette cuts through the creaminess perfectly. Cauliflower rice adds volume without carbs if you are watching that. Roasted broccoli on the side makes this feel like a complete, balanced meal.

• Serve with crusty bread for those who want something to soak up the sauce
• A light white wine pairs beautifully with the artichokes
• Extra red pepper flakes on the table lets heat lovers customize their portion

Pin it

There's something so satisfying about a casserole that manages to be comforting and good for you at the same time. I hope this becomes your new weeknight hero too.

Recipe FAQs

→ Can I use rotisserie chicken?

Yes, rotisserie chicken works perfectly and saves time. Simply shred about 3 cups from a store-bought rotisserie chicken.

→ Can I make this ahead of time?

Absolutely. Assemble the casserole up to 24 hours in advance, cover tightly, and refrigerate. Add 5-10 minutes to baking time if baking cold from the fridge.

→ Can I freeze this casserole?

Yes, freeze before baking for up to 3 months. Thaw overnight in the refrigerator, then bake as directed. Already-baked portions freeze well for 2 months.

→ What can I substitute for Greek yogurt?

Sour cream works as a 1:1 substitute. For a dairy-free option, try plain unsweetened coconut yogurt or a cashew cream blend.

→ How do I store leftovers?

Store in an airtight container in the refrigerator for up to 3 days. Reheat individual portions in the microwave or the entire dish in a 350°F oven until warmed through.

→ Can I make this spicy?

Increase the red pepper flakes to 1/2 teaspoon or add diced jalapeños. A splash of hot sauce or pinch of cayenne also works well.