Preheat the oven to 375°F.
Lightly coat a 9-by-13-inch baking dish with nonstick cooking spray.
Combine the softened cream cheese, shredded Italian cheese, minced garlic, and Italian seasoning in a medium bowl.
Arrange the chicken breasts in a single layer inside the prepared baking dish.
Season the chicken with salt and pepper to taste.
Divide the creamy garlic mixture between the chicken breasts. Spread it evenly over the top of each piece.
Cover the baking dish tightly with aluminum foil.
Bake for approximately 45 minutes, or until the thickest portion of the chicken reaches 165°F.
Carefully remove the foil and sprinkle the cheddar cheese over the chicken.
Return the dish to the oven uncovered. Bake for approximately 5 minutes, or until the cheese has melted.
Allow the chicken to rest for 5 minutes. Garnish with chopped parsley and serve warm.