1. First, preheat your oven to 375°F (190°C) and lightly grease a baking dish. In a bowl, mix the softened cream cheese, ¼ cup of the Parmesan cheese, garlic powder, and Italian seasoning until smooth and creamy. This will be the delectable filling for your Chicken Parmesan Stuffed with Cream Cheese.

2. Next, take each chicken breast and carefully slice a pocket into the side, being careful not to cut all the way through. Spoon the cream cheese filling into the pocket, adding about 2 tablespoons of the mozzarella cheese to each. Secure the chicken with toothpicks to keep the filling intact.

3. In a shallow dish, combine the remaining ¼ cup of Parmesan cheese with the Italian-style breadcrumbs. Dip the stuffed chicken breasts in the beaten egg, then coat them thoroughly in the breadcrumb mixture. Season the breaded chicken with salt and pepper.

4. Heat the olive oil in a large skillet over medium-high heat. Sear the breaded chicken for about 2 minutes per side until golden brown. This will help lock in the flavor and create a crispy exterior.

5. Transfer the seared chicken breasts to the prepared baking dish. Spoon the marinara sauce over and around the chicken, ensuring each piece is well-coated. Bake the Chicken Parmesan Stuffed with Cream Cheese for 20 minutes, then top with the remaining mozzarella cheese. Continue baking for an additional 5-7 minutes, or until the cheese is melted and bubbly, and the chicken reaches an internal temperature of 165°F (74°C).

6. Allow the chicken to rest for 5 minutes before serving. Remove the toothpicks, spoon the delicious sauce over the top, and savor the creamy, cheesy perfection of this Chicken Parmesan Stuffed with Cream Cheese delight!