I threw together a Creamy Zucchini Casserole that somehow tastes indulgent while sneaking veggies into every bite and still keeps it low-carb so the kids actually ask for seconds.

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I adore this Chicken & Zucchini Casserole because it tastes like comfort without the carb regret. I love how the creamy zucchini casserole part actually hides a mountain of vegetables under molten cheese and real chicken, no fake nonsense.

I’m obsessed with that tang from cream cheese mixed with shredded sharp cheddar cheese, salty and smooth. It’s hearty in the best way and picky kids eat it like adults.

But it’s not lightweight diner food. This is legit dinner that fills plates and quiets complaints.

And I eat leftovers cold. Not ashamed.

Bring on seconds every time no shame today.

Ingredients

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Chicken: hearty protein, keeps it filling and comforting.
Zucchini: mild, slightly zucchini-y texture, soaks up creaminess.
Cream cheese: makes it rich and luxuriously creamy.
Sour cream: tangy creaminess that cuts the richness.
Heavy cream: adds silkiness, makes sauce feel bougie.
Eggs: bind everything together so it isn’t runny.
Sharp cheddar: punchy, melty, gives that cheesy bite.
Mozzarella: gooey stretchiness, the comfort-food factor.
Parmesan: salty, nutty top-note that adds depth.
Onion: sweet-savory base, it makes things sing.
Garlic: sharp, warm hit you’ll notice first.
Olive oil or butter: starts the browning, adds flavor.
Italian seasoning: herb mix that keeps it familiar.
Smoked paprika: smoky warmth, subtle color boost.
Salt: pulls flavors together, don’t skip it.
Pepper: little heat that wakes up the dish.
Chicken broth: loosens sauce if it’s too thick.
Parsley or chives: bright garnish, makes it look lived-in.

Ingredient Quantities

1 1/2 lb boneless skinless chicken breasts, cooked and shredded or chopped

3 medium zucchini, about 1 1/2 lb, sliced or diced

8 oz cream cheese, softened

1 cup sour cream

1/2 cup heavy cream

2 large eggs, lightly beaten

2 cups shredded sharp cheddar cheese

1 cup shredded mozzarella cheese

1/3 cup grated Parmesan cheese

1 small yellow onion, finely diced

3 cloves garlic, minced

2 tbsp olive oil or butter

1 tsp Italian seasoning

1/2 tsp smoked paprika

1/2 tsp salt, plus more to taste

1/4 tsp black pepper, plus more to taste

1/4 cup low sodium chicken broth or water, optional for a looser sauce

2 tbsp chopped fresh parsley or chives for garnish, optional

How to Make this

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1. Preheat oven to 375°F (190°C) and grease a 9×13 inch baking dish or similar size; set aside.

2. If your chicken is not cooked yet, poach or roast about 1 1/2 lb boneless skinless breasts until done, then shred or chop roughly. If already cooked, just shred and set aside.

3. Heat 2 tbsp olive oil or butter in a large skillet over medium heat. Add 1 small finely diced yellow onion and cook until soft, about 4 minutes. Add 3 cloves minced garlic and cook 30 seconds until fragrant.

4. Add 3 medium zucchini, sliced or diced, to the skillet with 1 tsp Italian seasoning, 1/2 tsp smoked paprika, 1/2 tsp salt and 1/4 tsp black pepper. Sauté just until zucchini is tender but not falling apart, about 4 to 6 minutes. Taste and adjust seasoning.

5. In a large bowl, beat together 8 oz softened cream cheese, 1 cup sour cream, 1/2 cup heavy cream and 2 lightly beaten eggs until smooth. Stir in 2 cups shredded sharp cheddar and 1/3 cup grated Parmesan. If you want a looser sauce add up to 1/4 cup low sodium chicken broth or water.

6. Fold the shredded chicken and the cooked zucchini mixture into the cream cheese mixture until evenly combined. Reserve about 1/2 cup of the mozzarella or cheddar for the top if you like extra browning.

7. Pour the casserole mixture into the prepared baking dish, smoothing the top. Sprinkle the remaining 1 cup shredded mozzarella (and reserved cheese if used) evenly over the top.

8. Bake in preheated oven for 25 to 30 minutes, or until the center is set and the top is golden and bubbly. If the top browns too fast, tent with foil for the last 5 to 10 minutes.

9. Remove from oven and let rest 8 to 10 minutes so it firms up and is easier to slice. This also helps the flavors settle.

10. Garnish with 2 tbsp chopped fresh parsley or chives, taste for salt and pepper and serve warm. Don’t overmix from the start, or the casserole can get too dense, and try not to overcook the zucchini otherwise it gets mushy.

Equipment Needed

1. 9×13 inch baking dish, greased (or similar size)
2. large skillet for sautéing the onion, garlic and zucchini
3. 2 mixing bowls (one big for the cream cheese mixture, one for folding)
4. cutting board and sharp chef knife for the chicken, zucchini and onion
5. measuring cups and spoons
6. rubber spatula and a wooden spoon or sturdy spoon for stirring
7. hand mixer or whisk to smooth the cream cheese mixture
8. oven mitts and a trivet or cooling rack
9. box grater or pre-shredded cheeses and a spoon to reserve the topping

FAQ

Q: Can I use frozen zucchini instead of fresh? A: You can, but frozen zucchini holds more water. Thaw and squeeze out as much liquid as possible before adding, or roast it first to remove moisture. If you skip that step the casserole may turn out watery.

Q: How do I keep the casserole from getting soggy from the zucchini? A: Salt the sliced zucchini and let it sit 10 to 15 minutes, then pat dry with paper towels. You can also roast or sauté the zucchini briefly to evaporate extra liquid before mixing it in.

Q: Can I swap the cream cheese or heavy cream for lighter options? A: Yes. For a lighter version use low fat cream cheese and Greek yogurt in place of sour cream, and swap heavy cream for milk plus a tablespoon of flour to help thicken. The texture will be a touch less rich but still good.

Q: How far ahead can I assemble this casserole? A: Assemble up to 24 hours ahead, cover and refrigerate. If making further ahead freeze the unbaked casserole for up to 2 months. Thaw overnight in the fridge before baking and add a few extra minutes to cook time if still cold.

Q: Can I freeze leftovers and how should I reheat them? A: Yes. Freeze individual portions in airtight containers for 2 to 3 months. Reheat from frozen in a 350 F oven until heated through, or thaw overnight and reheat 20 to 25 minutes. Microwaving works for single servings but may make the zucchini softer.

Q: My casserole tastes bland, what can I do next time? A: Try increasing salt by a pinch, add a squeeze of lemon or a splash of chicken broth to brighten flavors, or stir in 1 to 2 teaspoons Dijon mustard or a handful of chopped fresh herbs before baking. Also use a sharper cheddar if you want more bite.

Chicken & Zucchini Casserole Recipe Substitutions and Variations

Chicken (1 1/2 lb boneless skinless): rotisserie chicken (shredded), leftover turkey, canned chicken (drained), or cooked chickpeas for a vegetarian swap — all work well if you want less prep.
Cream cheese (8 oz): full fat ricotta, Greek yogurt (thicker strained yogurt), mascarpone, or a softened goat cheese for tang; each will change texture a bit, but they all make it creamy.
Zucchini (3 medium): yellow summer squash, sliced eggplant, thinly diced cauliflower, or a mix of bell peppers and mushrooms if you want more color and bite.
Sharp cheddar (2 cups): Monterey Jack, Colby, Gouda, or a blend of mozzarella and Parmesan for melty stretch and a milder flavor.

Pro Tips

1) Don’t squeeze all the moisture out of the zucchini. Salt the cut zucchini lightly and let it sit 10 minutes, then blot gently with a paper towel. You want some moisture left so the casserole stays creamy, but not so much that it turns watery while baking.

2) Bring the cream cheese and sour cream to room temp before mixing. If the cream cheese is cold you’ll get lumps and end up overmixing to smooth it out, which makes the bake dense. If it still feels thick add the chicken broth or a splash of milk a tablespoon at a time.

3) Give the chicken some flavor boost. Toss shredded chicken with a pinch more Italian seasoning, smoked paprika, and a little salt before folding it in. If you have time, warm it briefly in the skillet with the onions and garlic so it soaks up the aromatics.

4) Watch the top in the last 10 minutes and rest the casserole. If the cheese browns too fast cover loosely with foil for the final bake time. Let it sit 8 to 10 minutes after coming out of the oven so it firms up; cutting too soon makes it fall apart and the texture becomes gluey.

Chicken & Zucchini Casserole Recipe

Recipe by Nikoli Athen

0.0 from 0 votes

I threw together a Creamy Zucchini Casserole that somehow tastes indulgent while sneaking veggies into every bite and still keeps it low-carb so the kids actually ask for seconds.

Servings

servings

Calories

788

kcal

Equipment: 1. 9×13 inch baking dish, greased (or similar size)
2. large skillet for sautéing the onion, garlic and zucchini
3. 2 mixing bowls (one big for the cream cheese mixture, one for folding)
4. cutting board and sharp chef knife for the chicken, zucchini and onion
5. measuring cups and spoons
6. rubber spatula and a wooden spoon or sturdy spoon for stirring
7. hand mixer or whisk to smooth the cream cheese mixture
8. oven mitts and a trivet or cooling rack
9. box grater or pre-shredded cheeses and a spoon to reserve the topping

Ingredients

1 1/2 lb boneless skinless chicken breasts, cooked and shredded or chopped
3 medium zucchini, about 1 1/2 lb, sliced or diced
8 oz cream cheese, softened
1 cup sour cream
1/2 cup heavy cream
2 large eggs, lightly beaten
2 cups shredded sharp cheddar cheese
1 cup shredded mozzarella cheese
1/3 cup grated Parmesan cheese
1 small yellow onion, finely diced
3 cloves garlic, minced
2 tbsp olive oil or butter
1 tsp Italian seasoning
1/2 tsp smoked paprika
1/2 tsp salt, plus more to taste
1/4 tsp black pepper, plus more to taste
1/4 cup low sodium chicken broth or water, optional for a looser sauce
2 tbsp chopped fresh parsley or chives for garnish, optional

Directions

Preheat oven to 375°F (190°C) and grease a 9×13 inch baking dish or similar size; set aside.
If your chicken is not cooked yet, poach or roast about 1 1/2 lb boneless skinless breasts until done, then shred or chop roughly. If already cooked, just shred and set aside.
Heat 2 tbsp olive oil or butter in a large skillet over medium heat. Add 1 small finely diced yellow onion and cook until soft, about 4 minutes. Add 3 cloves minced garlic and cook 30 seconds until fragrant.
Add 3 medium zucchini, sliced or diced, to the skillet with 1 tsp Italian seasoning, 1/2 tsp smoked paprika, 1/2 tsp salt and 1/4 tsp black pepper. Sauté just until zucchini is tender but not falling apart, about 4 to 6 minutes. Taste and adjust seasoning.
In a large bowl, beat together 8 oz softened cream cheese, 1 cup sour cream, 1/2 cup heavy cream and 2 lightly beaten eggs until smooth. Stir in 2 cups shredded sharp cheddar and 1/3 cup grated Parmesan. If you want a looser sauce add up to 1/4 cup low sodium chicken broth or water.
Fold the shredded chicken and the cooked zucchini mixture into the cream cheese mixture until evenly combined. Reserve about 1/2 cup of the mozzarella or cheddar for the top if you like extra browning.
Pour the casserole mixture into the prepared baking dish, smoothing the top. Sprinkle the remaining 1 cup shredded mozzarella (and reserved cheese if used) evenly over the top.
Bake in preheated oven for 25 to 30 minutes, or until the center is set and the top is golden and bubbly. If the top browns too fast, tent with foil for the last 5 to 10 minutes.
Remove from oven and let rest 8 to 10 minutes so it firms up and is easier to slice. This also helps the flavors settle.
Garnish with 2 tbsp chopped fresh parsley or chives, taste for salt and pepper and serve warm. Don’t overmix from the start, or the casserole can get too dense, and try not to overcook the zucchini otherwise it gets mushy.

Notes

Below you’ll find my best estimate of this recipe’s nutrition facts. Treat the numbers as a guide rather than a rule—great food should nourish both body and spirit. Figures are approximate, and the website owner assumes no liability for any inaccuracies in this recipe.