Preheat your oven to 375°F (190°C).
Using a sharp knife, carefully cut a pocket into each chicken breast, making sure not to cut all the way through.
Season the chicken breasts inside and out with salt, pepper, garlic powder, and dried thyme.
Stuff each pocket with slices of Brie cheese and a generous spoonful of cranberry sauce.
In a large oven-safe skillet, heat olive oil and butter over medium heat. Once the butter is melted and bubbling, add the stuffed chicken breasts.
Sear the chicken for about 4-5 minutes on each side until golden brown.
Once seared, carefully add chicken broth, balsamic vinegar, and honey to the skillet.
Transfer the skillet to the preheated oven and bake for 20-25 minutes, or until the chicken is cooked through and reaches an internal temperature of 165°F (75°C).
Remove the skillet from the oven and let the chicken rest for 5 minutes.
Garnish with fresh parsley before serving.