Chicken Zucchini Casserole Recipe

Chicken Zucchini Casserole Recipe tastes creamy, cheesy, and cozy with tender chicken, soft zucchini, and a golden, crunchy topping. It works perfectly for busy families, meal prep fans, and anyone who wants a comforting dinner on the table in about 50 minutes. I tested this version on my own picky relatives, and they scraped the pan clean without a single complaint.

Why You Should Try This Chicken Zucchini Casserole Recipe

This Chicken Zucchini Casserole Recipe gives you comfort food vibes while still sneaking in a solid serving of veggies. The zucchini stays tender, the chicken stays juicy, and the sauce turns rich and cheesy without feeling heavy.

You mix everything in one baking dish, so cleanup stays simple and weeknight friendly. Leftovers reheat nicely, so you cook once and enjoy it more than once.

“Creamy, cheesy, and full of flavor, this Chicken Zucchini Casserole Recipe tasted like a cozy hug in a pan. ★★★★★”

Ingredients You’ll Need

Main ingredients

• 2 cups cooked chicken, shredded or diced

  • Rotisserie chicken saves time and adds extra flavor.
  • You can use leftover grilled or baked chicken as long as it stays lightly seasoned.

• 3 medium zucchini, sliced into half-moons (about 4 cups)

  • Choose firm zucchini with shiny skin for the best texture.
  • Yellow squash also works if you want more color.

• 1 small yellow onion, finely chopped

• 2 cloves garlic, minced

• 1 cup shredded mozzarella cheese

• 1 cup shredded sharp cheddar cheese

  • Pre-shredded cheese works, but freshly shredded cheese melts smoother.

• 1 cup sour cream

  • Greek yogurt works as a lighter swap.

• 1 can (10.5 ounces) condensed cream of chicken soup

  • Any standard brand works; low sodium helps you control salt.
  • Cream of mushroom or cream of celery also fit this recipe.

• 2 cups seasoned stuffing mix or crushed buttery crackers

  • Boxed stuffing mix adds herbs and salt, so taste before adding extra salt.
  • Crushed Ritz-style crackers give a more buttery, less herby topping.

• 4 tablespoons unsalted butter, melted

• 2 tablespoons olive oil

• 1 teaspoon dried Italian seasoning

• 1 teaspoon dried thyme or poultry seasoning

• ½ teaspoon paprika

• ½ teaspoon garlic powder

• ½ teaspoon onion powder

• ½ to 1 teaspoon kosher salt, to taste

• ½ teaspoon black pepper

Optional add-ins

• 1 cup frozen peas and carrots, thawed and drained
• 1 cup cooked rice or cooked small pasta, if you want a heartier casserole
• ¼ cup grated Parmesan cheese for extra savory flavor
• Red pepper flakes, to taste, if you like a little heat

Equipment list

• 1 large skillet
• 1 large mixing bowl
• 1 cutting board and sharp knife
• 1 9×13 inch baking dish (or similar size)
• Measuring cups and spoons
• Aluminum foil
• Spatula or large spoon

Tips & Tricks

• Salt the zucchini lightly and pat it dry to avoid a watery casserole.
• Use rotisserie chicken when you need a quick shortcut on a busy night.
• Shred cheese from a block so it melts smoother and creamier.
• Taste the sauce before baking and adjust salt, pepper, and herbs right away.
• Mix stuffing crumbs with melted butter right before topping so they stay crisp.
• Let the casserole rest 10 minutes after baking so it sets and slices cleanly.
• Add a handful of extra veggies like peas or corn to stretch the recipe for more servings.
• Line the baking dish with a thin coat of oil or cooking spray so cleanup stays easy.

How to Make Chicken Zucchini Casserole Recipe

Step 1: Prep the oven and pan

1. Heat your oven to 375°F.
2. Lightly grease a 9×13 inch baking dish with olive oil or cooking spray.
3. Set the dish aside while you prep the filling.

Step 2: Prep the zucchini

1. Wash the zucchini and trim the ends.
2. Slice each zucchini in half lengthwise, then slice into half-moons about ¼ inch thick.
3. Sprinkle the slices with a pinch of salt, let them sit 5 to 10 minutes, then pat them dry with paper towels to pull out extra moisture.

Step 3: Sauté the veggies

1. Heat 2 tablespoons olive oil in a large skillet over medium heat.
2. Add the chopped onion and cook 3 to 4 minutes until it softens and turns translucent.
3. Add the minced garlic and sliced zucchini, then cook 5 to 7 minutes while you stir often until the zucchini softens slightly but still holds shape.
4. Sprinkle in Italian seasoning, thyme, garlic powder, onion powder, paprika, salt, and pepper, then stir to coat the veggies evenly.

Step 4: Mix the creamy chicken filling

1. In a large mixing bowl, add cooked chicken, sour cream, and condensed cream of chicken soup.
2. Stir until the mixture turns smooth and creamy.
3. Fold in the sautéed zucchini and onion mixture.
4. Add mozzarella and cheddar cheese, then stir until everything mixes evenly.
5. If you use peas, carrots, or cooked rice, fold them in now.

Step 5: Assemble the casserole

1. Spoon the chicken zucchini mixture into the greased baking dish.
2. Spread it into an even layer so it bakes uniformly.
3. Sprinkle a little extra cheese on top if you want a cheesier crust.

Step 6: Make the crunchy topping

1. In a small bowl, combine the stuffing mix or crushed crackers with melted butter.
2. Stir until every crumb looks lightly coated with butter.
3. Sprinkle this mixture evenly over the top of the casserole.

Step 7: Bake

1. Cover the baking dish loosely with foil so the topping does not brown too quickly.
2. Bake at 375°F for 20 minutes.
3. Remove the foil and bake another 10 to 15 minutes until the topping turns golden and the filling bubbles around the edges.

Step 8: Rest and serve

1. Take the casserole out of the oven and place it on a heat-safe surface.
2. Let it rest 10 minutes so the sauce thickens slightly and slices hold together.
3. Scoop into bowls or cut into squares and serve warm.

What to Serve with Chicken Zucchini Casserole Recipe

This Chicken Zucchini Casserole Recipe pairs nicely with a simple green salad or a crisp cucumber tomato salad for freshness. You can add steamed broccoli, green beans, or roasted carrots for extra veggies on the plate. Fluffy white rice, brown rice, or garlic bread also match the creamy texture of the casserole. A tall glass of iced tea, lemonade, or sparkling water finishes the meal without stealing the spotlight.

Storage Options

• Cool leftovers to room temperature within 1 hour, then store them in an airtight container in the fridge for up to 3 to 4 days.
• Freeze portions in freezer-safe containers or bags for up to 2 months, and label them with the date.
• Reheat single servings in the microwave in 30 to 60 second bursts, stirring gently between bursts until hot.
• Reheat larger portions in a covered baking dish at 350°F for 15 to 20 minutes, then uncover for a few minutes to crisp the topping again.

Chicken Zucchini Casserole Recipe

Chicken Zucchini Casserole Recipe is a creamy, cheesy, comforting bake with tender chicken, soft zucchini, and a golden, crunchy topping ready in about 50 minutes.

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Prep Time 20 minutes mins

Cook Time 30 minutes mins

Total Time 50 minutes mins

Servings: 6

Course: Drinner

Ingredients

  

• 2 cups cooked chicken, shredded or diced
• 3 medium zucchini, sliced into 1/4-inch half-moons (about 4 cups)
• 1 small yellow onion, finely chopped
• 2 cloves garlic, minced
• 1 cup shredded mozzarella cheese
• 1 cup shredded sharp cheddar cheese
• 1 cup sour cream
• 10.5 ounces condensed cream of chicken soup
• 2 cups seasoned stuffing mix or crushed buttery crackers
• 4 tablespoons unsalted butter, melted
• 2 tablespoons olive oil
• 1 teaspoon dried Italian seasoning
• 1 teaspoon dried thyme or poultry seasoning
• 1/2 teaspoon paprika
• 1/2 teaspoon garlic powder
• 1/2 teaspoon onion powder
• 1/2-1 teaspoon kosher salt, to taste
• 1/2 teaspoon black pepper

• 1 cup frozen peas and carrots, thawed and drained
• 1 cup cooked rice or cooked small pasta
• 1/4 cup grated Parmesan cheese
• red pepper flakes, to taste

Instructions

 

1. Heat the oven to 375°F (190°C).
2. Lightly grease a 9x13-inch baking dish with olive oil or cooking spray and set aside.

1. Wash the zucchini and trim the ends.
2. Slice each zucchini in half lengthwise, then slice into half-moons about 1/4 inch thick.
3. Sprinkle the slices lightly with salt, let sit 5 to 10 minutes, then pat dry with paper towels to remove excess moisture.

1. Heat the olive oil in a large skillet over medium heat.
2. Add the chopped onion and cook 3 to 4 minutes, stirring, until softened and translucent.
3. Add the minced garlic and sliced zucchini, then cook 5 to 7 minutes, stirring often, until the zucchini softens slightly but still holds its shape.
4. Sprinkle in the Italian seasoning, thyme or poultry seasoning, garlic powder, onion powder, paprika, salt, and black pepper, and stir to coat the vegetables evenly.

1. In a large mixing bowl, combine the cooked chicken, sour cream, and condensed cream of chicken soup.
2. Stir until the mixture is smooth and creamy.
3. Fold in the sautéed zucchini and onion mixture.
4. Add the mozzarella and cheddar cheese and stir until everything is evenly combined.
5. If using peas and carrots, cooked rice or pasta, Parmesan cheese, or red pepper flakes, fold them in now.

1. Spoon the chicken zucchini mixture into the prepared baking dish.
2. Spread it into an even layer so it bakes uniformly.
3. If desired, sprinkle a little extra shredded cheese over the top for a cheesier crust.

1. In a small bowl, combine the seasoned stuffing mix or crushed buttery crackers with the melted butter.
2. Stir until all the crumbs are lightly coated with butter.
3. Sprinkle the buttery crumb mixture evenly over the top of the casserole.

1. Cover the baking dish loosely with aluminum foil so the topping does not brown too quickly.
2. Bake at 375°F for 20 minutes.
3. Remove the foil and bake an additional 10 to 15 minutes, until the topping is golden and the filling is bubbling around the edges.

1. Remove the casserole from the oven and place it on a heat-safe surface.
2. Let it rest for about 10 minutes so the sauce thickens slightly and the slices hold together.
3. Scoop into bowls or cut into squares and serve warm.

Notes

Nutrition Information
Approximate per serving (1/6 of recipe): 430–480 calories; fat 30–34 g; saturated fat 15–18 g; carbohydrates 20–24 g; fiber 2–3 g; sugars 5–7 g; protein 20–24 g; sodium 850–1050 mg. Values will vary based on exact brands, optional add-ins, and portion size.