Creamy Mushroom and Spinach Stuffed Chicken pairs tender chicken breasts with a savory filling of sautéed mushrooms, wilted spinach, cream cheese, Parmesan, and garlic. The filling stays rich and creamy while the chicken develops a lightly browned exterior and finishes gently in the oven.

Creamy Mushroom and Spinach Stuffed Chicken featured image

Searing the stuffed chicken before baking adds color and flavor without requiring a complicated technique. Toothpicks help keep the filling tucked inside, and an instant-read thermometer takes the guesswork out of determining when the chicken is safely cooked through.

Recipe at a Glance

Prep Time: 25 minutes
Cook Time: 25 minutes
Additional Time: 5 minutes
Total Time: 55 minutes
Yield: 4 stuffed chicken breasts
Servings: 4
Difficulty: Intermediate

What You Need Before You Start

Large 12-inch (30 cm) oven-safe skillet
Cutting board
Sharp chef's or boning knife
Mixing bowl
Silicone spatula or wooden spoon
Toothpicks
Instant-read meat thermometer

Ingredients and Helpful Swaps

Creamy Mushroom and Spinach Stuffed Chicken ingredients

■ Mushroom and Spinach Filling
■ 1 tablespoon (15 ml) olive oil
■ 6 ounces (170 g) cremini mushrooms, finely chopped
■ 2 cups (60 g) baby spinach, roughly chopped
■ 2 garlic cloves (about 6 g), minced
■ 4 ounces (115 g) full-fat cream cheese, softened
■ ⅓ cup (30 g) finely grated Parmesan cheese
■ ¼ teaspoon fine salt
■ ⅛ teaspoon ground black pepper
■ Chicken
■ 4 boneless, skinless chicken breasts, about 7 to 8 ounces (200 to 225 g) each
■ 1 teaspoon fine salt
■ ½ teaspoon ground black pepper
■ ½ teaspoon garlic powder
■ ½ teaspoon Italian seasoning
■ 1 tablespoon (15 ml) olive oil

Chicken breasts: Choose similarly sized, relatively thick breasts so they can hold the filling and cook at approximately the same rate. Very thin chicken cutlets are not a suitable substitute because they cannot hold a deep pocket.
Cremini mushrooms: These add savory flavor and a pleasantly meaty texture. White button mushrooms can be substituted in the same quantity; their flavor will be slightly milder.
Baby spinach: Fresh spinach wilts quickly and contributes color without overwhelming the filling. Thawed frozen spinach can work, but it must be squeezed very dry first to prevent excess moisture.
Cream cheese: Full-fat cream cheese creates a thick filling that holds together as the chicken cooks. Neufchâtel cheese can be substituted, although the filling may be somewhat softer and less rich.
Parmesan: Parmesan adds saltiness and savory depth while helping thicken the filling. Pecorino Romano can be substituted, but it is generally saltier and sharper, so the filling's added salt may need to be reduced.

How to Make Creamy Mushroom and Spinach Stuffed Chicken

Heat the oven to 400°F (200°C). Have the chicken, filling ingredients, and toothpicks ready before you begin assembling.
Heat 1 tablespoon (15 ml) olive oil in a large 12-inch (30 cm) oven-safe skillet over medium-high heat. Add the chopped mushrooms and cook for 5 to 7 minutes, stirring occasionally, until their released liquid has evaporated and the mushrooms are lightly browned.
Reduce the heat to medium. Add the spinach and minced garlic and cook for 1 to 2 minutes, stirring, until the spinach is wilted and excess moisture has evaporated. Remove the mixture from the skillet and let it cool for about 5 minutes.
Combine the softened cream cheese, Parmesan, ¼ teaspoon salt, and ⅛ teaspoon black pepper in a mixing bowl. Stir in the mushroom-spinach mixture. The finished filling should be thick, creamy, and scoopable rather than runny.
Pat the chicken breasts dry. Working with one breast at a time, place it flat on a cutting board and carefully cut a deep horizontal pocket into the thickest side. Stop before cutting through the opposite side or ends.
Season the outside of the chicken evenly with 1 teaspoon salt, ½ teaspoon black pepper, garlic powder, and Italian seasoning. Divide the filling evenly among the four pockets. Gently press the edges together and secure each opening with toothpicks. Avoid packing the pockets so tightly that the filling is forced out.
Wipe out the skillet if necessary, then heat the remaining 1 tablespoon (15 ml) olive oil over medium-high heat. Add the stuffed chicken and sear for about 2 to 3 minutes per side, until golden brown. Turn carefully so the pockets remain closed.
Transfer the oven-safe skillet to the preheated 400°F (200°C) oven. Bake for 12 to 17 minutes, depending on the thickness of the chicken. Check the thickest part of the meat rather than the filling; the chicken should reach a safe internal temperature of 165°F (74°C).
Remove the skillet from the oven and let the chicken rest for 5 minutes. Remove all toothpicks before serving. The chicken should be juicy and opaque throughout, with a hot, creamy filling in the center.

Kitchen-Tested Tip

Choose chicken breasts of similar thickness so they finish cooking at roughly the same time.
Let the mushroom mixture cook until its visible moisture has evaporated. Excess liquid can make the filling loose and encourage it to leak.
Keep the pocket opening relatively narrow while creating plenty of room inside the breast for the filling.

Why You Will Love This Recipe

Sautéing the mushrooms before making the filling cooks off excess moisture, helping prevent a watery filling.
Cream cheese binds the spinach, mushrooms, Parmesan, and garlic into a thick mixture that is easier to keep inside the chicken.
A quick stovetop sear gives the chicken an appetizing golden surface before it finishes cooking in the oven.
Cutting a deep pocket rather than slicing the chicken breast completely in half gives the filling space while keeping the chicken intact.
Resting the chicken for 5 minutes after baking allows the meat to settle before slicing.

Storage and Make-Ahead Tips

Refrigerate leftover stuffed chicken in an airtight container within 2 hours of cooking and use within 3 to 4 days. For reheating, cover the chicken loosely and warm it in a 325°F (165°C) oven until the center reaches 165°F (74°C); gentler reheating helps reduce dryness.
For freezing, cool the cooked chicken completely, wrap the individual portions well, and place them in a freezer-safe container or bag. Freeze for up to 2 months for good quality. Thaw overnight in the refrigerator before reheating.
For make-ahead preparation, the mushroom-spinach filling can be prepared up to 1 day ahead and refrigerated in an airtight container. Assemble the chicken shortly before cooking rather than storing raw stuffed chicken for an extended period.

Creamy Mushroom and Spinach Stuffed Chicken final dish

FAQ

Can I make this recipe ahead of time?

Yes. Prepare the mushroom and spinach filling up to one day ahead and keep it covered in the refrigerator. Let it soften slightly while you prepare the chicken, then stuff and cook the chicken as directed.

How do I keep the filling from leaking out?

Cook excess moisture from the mushrooms and spinach, use softened rather than melted cream cheese, avoid overfilling the pockets, and secure the openings with toothpicks. Some minor leakage during cooking is normal.

Can I use frozen spinach?

Yes. Thaw it completely and squeeze out as much liquid as possible before adding it to the filling. Excess water can make the cream cheese mixture loose.

How do I know when stuffed chicken is done?

Insert an instant-read thermometer into the thickest part of the chicken meat without pushing the probe into the filling. The chicken is safely cooked when it reaches 165°F (74°C).

Can I use chicken thighs instead?

Boneless chicken thighs are not a direct substitute because their shape makes cutting and filling a pocket more difficult. They would require a different stuffing and cooking technique.