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Cheesy Garlic Butter Mushroom Stuffed Chicken

Cheesy garlic butter mushroom stuffed chicken with deeply caramelized, golden seared chicken and a molten mushroom-cheese filling that steams when sliced. Oven-baked to 165°F, it delivers juicy, tender breasts with a rich garlic butter drizzle over top.
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Prep Time 20 minutes
Cook Time 30 minutes
resting 5 minutes
Total Time 55 minutes
Servings: 4 servings
Course: Main Dish
Cuisine: American
Calories: 720
Ingredients Equipment Method Notes

Ingredients
  

Chicken breasts
  • 4 boneless skinless chicken breasts Use evenly sized breasts for consistent baking time.
Seasoning and oil
  • 0.5 tsp salt To taste; season inside and out.
  • 0.5 tsp pepper To taste; season inside and out.
  • 0.5 tsp garlic powder To taste; season inside and out.
  • 0.5 tsp smoked paprika To taste; season inside and out.
  • 2 tbsp olive oil For searing in the skillet.
Mushroom filling
  • 3 tbsp butter For sautéing mushrooms and building the garlic butter base.
  • 8 oz cremini mushrooms Finely diced to help them fit inside the chicken pockets.
  • 4 garlic cloves Minced; use fresh for best flavor.
  • 1 tsp fresh thyme leaves Leaves only; mince lightly if needed.
  • 0.5 tsp salt To taste for the filling.
  • 0.5 tsp pepper To taste for the filling.
  • 1 cup shredded mozzarella cheese Stir in off heat so it melts into the mixture.
  • 0.5 cup Parmesan cheese Grated; provides salty, nutty flavor.
Finishing
  • 1 toothpicks Use to secure chicken pockets during searing and baking.
  • 0.25 cup extra garlic butter Drizzle after baking before slicing.

Equipment

  • 1 cast iron skillet

Method
 

Make the mushroom cheese filling
  1. Melt the butter in an oven-safe skillet over medium-high heat, add the diced cremini mushrooms, and cook 5-6 minutes until all moisture has evaporated, stirring occasionally as they brown.
  2. Add the minced garlic and fresh thyme leaves and cook 1 minute, just until fragrant, then turn off the heat and cool slightly.
  3. Stir in the shredded mozzarella cheese and the grated Parmesan cheese until the mixture turns cohesive and stretchy.
Prep and fill the chicken
  1. Cut a deep pocket in each chicken breast, then season inside and out generously with salt, pepper, garlic powder, and smoked paprika.
  2. Spoon the mushroom cheese mixture into each pocket and secure the openings with toothpicks so the filling stays contained.
Sear and bake
  1. Heat the olive oil in the oven-safe skillet over medium-high heat and sear the stuffed chicken breasts 3-4 minutes per side until golden.
  2. Bake at 400°F for 18-22 minutes until the internal temperature reaches 165°F.
Finish
  1. Remove the toothpicks, drizzle with extra garlic butter, and rest 5 minutes before slicing so the filling stays molten and the juices settle.

Notes

For cleaner slicing, use kitchen towel paper to blot the chicken surfaces before seasoning so browning is more even. Refrigerate leftovers in a sealed container for up to 3 days; reheat gently at 300°F until warmed through. Freezing is not recommended because the filled texture can become watery. For a dairy-light swap, use low-moisture part-skim mozzarella and a reduced-fat Parmesan (expect a slightly less stretchy filling).