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Chicken, Spinach, and Mushroom Bake

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Prep Time: 20 minutes | Cook Time: 35-40 minutes | Total Time: About 1 hour
Intensity: Easy | Serves: 4-6

A creamy, comforting, and complete one-dish meal that’s perfect for busy weeknights or cozy weekend dinners. Tender chicken, earthy mushrooms, and fresh spinach are enveloped in a creamy, cheesy sauce and baked until golden and bubbly. It’s hearty, flavorful, and sure to become a family favorite.

Ingredients

  • 1.5 lbs (680g) boneless, skinless chicken breasts, cut into 1-inch cubes

  • 8 oz (225g) cremini or white button mushrooms, sliced

  • 5 oz (140g) fresh baby spinach

  • 1 medium yellow onion, finely diced

  • 3 cloves garlic, minced

  • 2 tablespoons olive oil, divided

  • 1 tablespoon butter

  • 3 tablespoons all-purpose flour

  • 1.5 cups (360ml) low-sodium chicken broth

  • 1 cup (240ml) heavy cream or half-and-half

  • 1 cup (100g) shredded mozzarella cheese

  • ½ cup (50g) freshly grated Parmesan cheese, divided

  • 1 teaspoon dried thyme

  • ½ teaspoon dried oregano

  • ½ teaspoon paprika

  • Salt and freshly ground black pepper, to taste

  • Fresh parsley, chopped (for garnish)

Instructions

1. Prep and Sauté:
Preheat your oven to 375°F (190°C). Lightly grease a 9×13 inch baking dish.
Season the cubed chicken generously with salt, pepper, and the paprika. In a large skillet or Dutch oven, heat 1 tablespoon of olive oil over medium-high heat. Add the chicken in a single layer and cook for 5-6 minutes, stirring occasionally, until golden brown on all sides and mostly cooked through. Remove the chicken with a slotted spoon and set aside in a bowl.

2. Cook the Vegetables:
In the same skillet, add the remaining 1 tablespoon of olive oil and the butter. Reduce heat to medium. Add the diced onion and sauté for 3-4 minutes until softened. Add the sliced mushrooms and cook for another 5-7 minutes, until they have released their moisture and are browned.
Add the minced garlic, dried thyme, and oregano, and cook for 1 minute until fragrant. Gradually add the fresh spinach in handfuls, stirring until each addition wilts, about 2-3 minutes total.

3. Make the Cream Sauce:
Sprinkle the flour over the vegetable mixture. Stir constantly for 1-2 minutes to cook off the raw flour taste. Slowly pour in the chicken broth while whisking continuously to prevent lumps. Bring to a gentle simmer until the mixture thickens slightly, about 2-3 minutes.
Reduce heat to low and stir in the heavy cream. Let the sauce simmer gently for another 2-3 minutes until it coats the back of a spoon. Season the sauce well with salt and pepper. Remove from heat.

4. Combine and Assemble:
Stir the browned chicken (and any accumulated juices) back into the skillet with the sauce and vegetables. Add half of the Parmesan cheese and all of the mozzarella cheese, stirring until the cheese begins to melt and everything is well combined.

5. Bake:
Pour the entire mixture into your prepared baking dish. Spread it into an even layer. Sprinkle the remaining Parmesan cheese evenly over the top.
Bake, uncovered, in the preheated oven for 25-30 minutes, or until the sauce is bubbling vigorously around the edges and the top is golden brown.

6. Rest and Serve:
Remove the bake from the oven and let it rest for 5-10 minutes before serving. This allows the sauce to thicken slightly for perfect serving consistency. Garnish with freshly chopped parsley.

Serving Suggestions & Notes

  • Serving: This bake is a complete meal on its own! For a heartier option, serve it over steamed rice, egg noodles, mashed potatoes, or with a side of crusty bread to soak up every bit of the delicious sauce.

  • Make-Ahead: You can assemble the entire dish (through step 4) up to a day in advance. Cover and refrigerate. When ready to bake, let it sit at room temperature for 20-30 minutes, then bake as directed, adding a few extra minutes if needed.

  • Storage & Reheating: Store leftovers in an airtight container in the refrigerator for up to 3 days. Reheat gently in the microwave or in a covered oven-safe dish at 325°F until warmed through. You may need to add a splash of broth or cream when reheating to loosen the sauce.

  • Variations:

    • Vegetarian: Omit the chicken and use vegetable broth. Add an extra 8 oz of mushrooms and a can of drained white beans or chickpeas for protein.

    • Cheese Lovers: Add ½ cup of shredded Gruyère or sharp cheddar to the sauce.

    • Herbs: Substitute 1 tablespoon of fresh chopped thyme or rosemary for the dried herbs.

Nutrition Information (Per Serving, based on 6 servings)

  • Calories: ~495 kcal

  • Total Fat: 33g

    • Saturated Fat: 16g

  • Cholesterol: 145mg

  • Sodium: 480mg (varies with seasoning)

  • Total Carbohydrates: 13g

    • Dietary Fiber: 2g

    • Sugars: 4g

  • Protein: 38g

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