Rotisserie Chicken Zucchini Casserole

This Rotisserie Chicken Zucchini Casserole turns two simple ingredients into pure comfort food. I still remember the first night I made it using leftover rotisserie chicken and fresh zucchini from the garden. My family kept going back for seconds — and then thirds.

There’s something special about a casserole that almost cooks itself. On busy evenings when the house was full and dinner needed to be fast, I always reached for rotisserie chicken and fresh vegetables. This easy mix of tender zucchini, shredded chicken, and a creamy, cheesy sauce quickly became a favorite at our Sunday table. As it bakes, the top turns golden and bubbly, and the smell fills the kitchen with warmth and comfort.

What Makes This Rotisserie Chicken Zucchini Casserole So Special

After making casseroles for over forty years, I can say this one checks every box for an easy dinner. Using rotisserie chicken saves time and adds deep roasted flavor without extra work.

Why you’ll love this casserole:

• Uses rotisserie chicken – No need to cook chicken from scratch
• Ready in about 50 minutes – From oven to table in under an hour
• One-dish meal – Easy prep and quick cleanup
• Great for meal prep – Stores well and tastes even better the next day
• Creamy and filling – Mayonnaise, sour cream, and cheese create the perfect texture
• Perfect for zucchini season – A great way to use fresh summer zucchini

I’ve served this casserole at potlucks, shared it with neighbors, and made it many times for family dinners. It’s always a hit.

Ingredient Spotlight

• Rotisserie chicken gives the casserole rich flavor and saves time. A warm chicken is easier to shred.
• Fresh zucchini adds a soft texture and mild taste that soaks up the creamy sauce. Medium zucchini work best.
• Mozzarella cheese melts smoothly and creates those stretchy cheese pulls everyone loves.
• Parmesan cheese adds a sharp, nutty flavor and helps create a golden top.
• Mayonnaise and sour cream form the creamy base. Full-fat versions give the best texture.
• Italian seasoning adds classic herb flavor with basil, oregano, and thyme.
• Smoked paprika adds gentle warmth and depth.
• Garlic and onion build flavor and add natural sweetness when cooked first.

How to Make Rotisserie Chicken Zucchini Casserole

Step 1: Preheat your oven to 375°F and place the rack in the center for even baking.

Step 2: Heat olive oil in a skillet over medium heat. Add diced onion and cook for 3–4 minutes until soft and lightly golden.

Step 3: Add minced garlic and cook for one more minute, stirring often so it doesn’t burn.

Step 4: In a large bowl, mix the shredded chicken, sliced zucchini, cooked onion and garlic, mayonnaise, sour cream, Italian seasoning, salt, pepper, and paprika. Stir until evenly coated.

Step 5: Grease a 9×13-inch baking dish with cooking spray or olive oil.

Step 6: Spread the mixture evenly in the dish. Press it down gently to remove air pockets.

Step 7: Sprinkle mozzarella and Parmesan cheese evenly over the top, including the edges.

Step 8: Bake for 25–30 minutes until the cheese is bubbly and golden, and the zucchini is tender.

Step 9: Let the casserole rest for 5–10 minutes before serving. This helps it set and slice cleanly.

Step 10: Garnish with fresh chopped parsley before serving for color and freshness.

Keeping This Casserole Fresh

Store leftovers in an airtight container in the refrigerator for up to 3 days. The flavors deepen overnight, and many people say it tastes even better the next day.

This casserole also freezes well. Freeze the cooled dish or individual portions in airtight containers for up to 2 months. Thaw overnight in the fridge before reheating.

For best results, reheat in the oven at 350°F for 10–15 minutes until warm and bubbly. The microwave works faster, but the oven keeps the texture creamy and the cheese slightly crisp.

Perfect Partners for This Casserole

This rich Rotisserie Chicken Zucchini Casserole pairs best with fresh, lighter sides:

• Simple green salad with vinaigrette
• Garlic bread or crusty French bread
• Roasted green beans
• Steamed broccoli
• Fresh tomato slices with basil
• Caesar salad

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