Tender chicken baked with garlic mushrooms, creamy spinach, Parmesan, and melted mozzarella. A comforting oven-baked dinner with no pasta or rice.

 Servings

4 servings

 Time

• Prep: 15 minutes
• Cook: 30–35 minutes
• Total: About 50 minutes

Ingredients

 Chicken

• 1½ lb (680 g) boneless, skinless chicken breasts
• 1 tablespoon olive oil
• 1 teaspoon paprika
• ½ teaspoon garlic powder
• ½ teaspoon Italian seasoning
• ½ teaspoon salt
• ¼ teaspoon black pepper

 Spinach & Mushroom Mixture

• 8 oz (225 g) mushrooms, sliced
• 5 oz (140 g) fresh spinach
• 2 tablespoons butter
• 3 cloves garlic, minced
• ½ small onion, finely diced
• ¼ teaspoon salt
• ¼ teaspoon black pepper
• ½ teaspoon Italian seasoning

 Creamy Sauce

• ½ cup heavy cream
• ½ cup cream cheese, softened
• ¼ cup grated Parmesan cheese
• ½ cup shredded mozzarella
• ¼ teaspoon garlic powder
• ¼ teaspoon black pepper
• Pinch of salt

Topping

• ¾ cup shredded mozzarella
• 2 tablespoons grated Parmesan
• 1 tablespoon chopped fresh parsley

Instructions

1. Preheat the Oven

Preheat your oven to 375°F (190°C).

Lightly grease a 9 × 13-inch (23 × 33 cm) baking dish.

2. Prepare the Chicken

Pat the chicken breasts dry.

If the breasts are very thick, carefully slice them horizontally or gently pound them to a more even thickness.

Season both sides with:

• Paprika
• Garlic powder
• Italian seasoning
• Salt
• Black pepper

Drizzle with olive oil and rub the seasoning evenly over the chicken.

3. Sauté the Mushrooms

Heat a large skillet over medium heat.

Add the butter.

Once melted, add the sliced mushrooms.

Cook for 5–7 minutes, stirring occasionally, until the mushrooms are browned and most of their moisture has evaporated.

Add the diced onion and cook for another 2–3 minutes.

4. Add Garlic & Spinach

Add the minced garlic and cook for about 30–60 seconds.

Add the fresh spinach.

Cook for 2–3 minutes, stirring, until the spinach wilts.

Season with salt, pepper, and Italian seasoning.

Remove from the heat.

5. Make the Creamy Sauce

In a bowl, combine:

• Heavy cream
• Softened cream cheese
• ¼ cup Parmesan
• ½ cup mozzarella
• Garlic powder
• Black pepper
• Salt

Mix until smooth.

If the cream cheese is difficult to blend, let it soften at room temperature before mixing.

6. Combine the Spinach & Mushroom Mixture

Pour the creamy sauce into the skillet with the mushrooms and spinach.

Stir gently over low heat for 1–2 minutes, just until everything is combined and creamy.

Don’t boil the sauce.

7. Assemble the Casserole

Place the seasoned chicken breasts in the prepared baking dish.

Spoon the creamy spinach and mushroom mixture evenly over the chicken.

Make sure the chicken is well covered.

8. Add the Cheese Topping

Sprinkle the remaining:

• ¾ cup mozzarella
• 2 tablespoons Parmesan

over the top.

9. Bake

Place the dish in the preheated oven.

Bake uncovered for approximately 25–30 minutes, depending on the thickness of the chicken.

The chicken should reach an internal temperature of 165°F (74°C) at the thickest part.

If you want a more golden cheese topping, switch to the broiler for 1–2 minutes at the end, watching carefully.

10. Rest & Garnish

Remove the dish from the oven.

Let it rest for 5 minutes.

Sprinkle with fresh parsley.

Serve warm.

 Tips for the Best Results

• Slice thick chicken breasts evenly so they cook at the same rate.
• Cook the mushrooms until their excess moisture evaporates.
• Don’t boil the creamy sauce.
• Don’t overcrowd the mushrooms while sautéing.
• Use freshly grated Parmesan for a smooth sauce.
• Check the chicken with a food thermometer rather than relying only on cooking time.
• Let the casserole rest before serving so the sauce thickens slightly.

 Easy Substitutions

Chicken

Use boneless, skinless chicken thighs instead of breasts.

Cheese

Try mozzarella, Monterey Jack, provolone, or a mild cheddar.

Spinach

Frozen spinach can be used. Thaw it completely and squeeze out excess water first.

Mushrooms

Button, cremini, or baby bella mushrooms work well.

Cream

Heavy cream gives the richest sauce, but half-and-half can also be used.

 Optional Add-Ins

For extra flavor, add:

• Sun-dried tomatoes
• Fresh basil
• Red pepper flakes
• Chopped parsley
• Fresh thyme
• A small amount of pesto
• Artichoke hearts

 Serving Suggestions

Serve with low-starch vegetables such as:

• Roasted broccoli
• Green beans
• Asparagus
• Zucchini
• Cauliflower
• Simple green salad

Storage

Store leftovers in an airtight container in the refrigerator.

For best quality, enjoy within 3–4 days.

Reheat gently until heated through.

 Approximate Nutrition

Per serving, depending on the exact ingredients:

• Calories: 500–600
• Protein: 45–55 g
• Carbohydrates: 8–12 g
• Fat: 30–38 g
• Fiber: 2–3 g

These are estimates and can vary based on the specific products and portion sizes used.

 Q&A

Can I use frozen spinach?

Yes. Thaw it completely and squeeze out as much excess water as possible before adding it.

Can I use chicken thighs?

Yes. Boneless, skinless thighs work well and tend to stay juicy.

Can I make this ahead?

Yes. Assemble the dish, cover it, refrigerate it, and bake when ready. Make sure the chicken reaches 165°F (74°C) in the center.

Can I use a different cheese?

Absolutely. Mozzarella, Parmesan, provolone, Monterey Jack, or cheddar can work.

Why is my sauce watery?

The mushrooms and spinach may contain excess moisture. Cook the mushrooms well and squeeze frozen spinach thoroughly before adding it.

Can I make it without cream cheese?

Yes. Increase the Parmesan and mozzarella slightly and use enough cream to create a smooth sauce.

Can I add garlic?

Yes. Fresh minced garlic gives the mushrooms and creamy sauce excellent flavor.

Can I make it spicy?

Yes. Add a pinch of red pepper flakes or a little cayenne.

Is it suitable for meal prep?

Yes. Portion the cooked casserole into airtight containers and refrigerate promptly.

How do I know the chicken is done?

The thickest part should reach 165°F (74°C) when checked with a food thermometer.