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Cheesy Garlic Butter Mushroom Stuffed Chicken

Cheesy garlic butter mushroom stuffed chicken with a golden sear and a molten mozzarella-Parmesan filling. Deep pockets are packed with garlic mushroom butter and baked until juicy and steaming, then finished with a garlic butter drizzle.
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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: 610
Ingredients Equipment Method Notes

Ingredients
  

Chicken breasts
  • 4 boneless skinless chicken breasts
Seasonings
  • 0.25 tsp salt to taste
  • 0.25 tsp pepper to taste
  • 0.5 tsp garlic powder to taste
  • 0.5 tsp smoked paprika to taste
Searing
  • 2 tbsp olive oil
Mushroom filling
  • 3 tbsp butter
  • 8 oz cremini mushrooms finely diced
  • 4 garlic cloves minced (4 cloves)
  • 1 tsp fresh thyme leaves
  • 0.25 tsp salt to taste
  • 0.25 tsp pepper to taste
  • 1 cup shredded mozzarella cheese
  • 0.5 cup Parmesan cheese grated
To secure and finish
  • 4 toothpicks for securing
  • 1 tbsp extra garlic butter for drizzling

Equipment

  • 1 oven-safe skillet

Method
 

Make the mushroom cheese filling
  1. Melt the butter in a skillet over medium-high heat, then add the diced cremini mushrooms and cook 5-6 minutes until all moisture evaporates, stirring occasionally and looking for dry, sautéed mushrooms.
  2. Add the minced garlic and fresh thyme leaves and cook for 1 minute until fragrant, then remove from heat and let the mixture cool slightly so the cheese won’t seize.
  3. Stir in the shredded mozzarella and grated Parmesan until fully combined and melty, then set the filling aside.
Prepare and fill the chicken
  1. Cut a deep pocket into each chicken breast, keeping the bottom intact, 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 opening with toothpicks so the filling stays inside during cooking.
Sear and bake
  1. Heat olive oil in the oven-safe skillet over medium-high heat and sear the stuffed chicken 3-4 minutes per side until deeply golden with caramelized edges.
  2. Bake at 400°F for 18-22 minutes until the internal temperature reaches 165°F, watching for juices to run clear.
  3. Remove from the oven, take out the toothpicks, drizzle with extra garlic butter, and rest 5 minutes before slicing so the filling stays molten but doesn’t spill.

Notes

For the best molten center, cool the mushroom mixture slightly before mixing in the mozzarella and Parmesan—this prevents clumping. Refrigerate leftovers in an airtight container for 3-4 days; reheat gently in a 300°F oven until warmed through. Freezing is not recommended because the cheese filling can change texture after thawing. Dietary swap: use lactose-free cheese if you need a lactose-reduced option.