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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 mushroom filling. Deeply seasoned chicken breasts are pocketed, stuffed, and baked until the interior is steaming and reaches 165°F.
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Prep Time 20 minutes
Cook Time 30 minutes
resting 5 minutes
Total Time 55 minutes
Servings: 4 servings
Course: Dinner
Cuisine: American
Calories: 740
Ingredients Equipment Method Notes

Ingredients
  

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

Equipment

  • 1 oven-safe skillet

Method
 

Make the mushroom-cheese filling
  1. Cook the cremini mushrooms in butter over medium-high heat for 5-6 minutes until all moisture has evaporated, stirring so they brown evenly. The mixture should look drier and slightly caramelized as the pan clears.
  2. Add the minced garlic and fresh thyme leaves and cook for 1 minute, stirring constantly to keep the garlic from browning too fast. You should smell garlic and thyme right away.
  3. Cool the mushroom mixture for a few minutes until it's warm but not hot. This helps prevent the cheese from melting immediately and keeps the filling workable.
  4. Stir in the shredded mozzarella cheese and grated Parmesan cheese until fully combined and thick. The filling should look glossy and cohesive.
Stuff and season the chicken
  1. Cut a deep pocket in each chicken breast, keeping the bottom intact so it will hold the filling. Aim for an even opening across the thickness.
  2. Season inside each pocket and on the outside of the chicken breasts with salt, pepper, garlic powder, and smoked paprika to taste. Press the spices gently so they adhere.
  3. Fill each pocket with the mushroom-cheese mixture and secure the opening with toothpicks. The filling should be contained with no gaps spilling out.
Sear and bake
  1. Heat olive oil in an oven-safe skillet over medium-high heat, then sear the stuffed chicken for 3-4 minutes per side until golden. The exterior should develop deep caramel-brown color.
  2. Bake in the oven at 400°F for 18-22 minutes, until the internal temperature reaches 165°F. The filling should be hot and the chicken should feel firm when pressed.
Finish and serve
  1. Remove the toothpicks and drizzle with extra garlic butter over the top. Let the sauce glisten on the browned surface.
  2. Rest the chicken for 5 minutes before slicing. This keeps the molten filling from running out too quickly and supports juicy slices.

Notes

Pro tip: evaporate the mushroom moisture fully before adding garlic and thyme so the filling stays thick, not watery. Refrigerate leftovers in an airtight container for up to 3 days; reheat gently in the oven or a skillet so the cheese stays creamy. Freezing is not recommended because the texture of the stuffed filling can turn soft. For a lighter option, use part-skim mozzarella and reduce Parmesan slightly.