Preheat oven to 375 degrees Fahrenheit. Using a sharp knife, carefully cut a horizontal pocket into the thickest part of each chicken breast, being careful not to cut all the way through.

Place 2 ounces of sliced brie cheese into each chicken breast pocket. Wrap 2 slices of prosciutto around each stuffed chicken breast, tucking the ends underneath to secure.

In a small bowl, combine garlic powder, Italian seasoning, salt, and black pepper. Brush each wrapped chicken breast with olive oil and sprinkle the seasoning mixture evenly over all sides.

Heat a large oven-safe skillet over medium-high heat. Add the remaining olive oil and sear the chicken breasts for 2-3 minutes per side until the prosciutto is crispy and golden brown.

Transfer the skillet to the preheated oven and bake for 20-25 minutes, or until the internal temperature reaches 165 degrees Fahrenheit and the chicken is cooked through.

Remove from oven and let the chicken rest for 5 minutes before serving. This allows the juices to redistribute and the cheese to set slightly.

Garnish with freshly chopped parsley and serve immediately while the cheese is still warm and creamy. Pair with roasted vegetables or a fresh salad.