Preheat the oven: Preheat your oven to 375°F (190°C). Grease a baking dish with a light coat of cooking spray or oil to prevent sticking.

Season the chicken: Pat the chicken breasts dry with paper towels. Sprinkle salt, pepper, garlic powder, and Italian herbs generously on both sides of each chicken breast. Arrange the seasoned chicken breasts in the baking dish that you've prepared.

Prepare the cheese topping: In a small mixing bowl, combine the mayonnaise, sour cream, and Parmesan cheese. Stir until all ingredients are well blended into a creamy mixture.

Assemble the chicken: Place two slices of provolone cheese on top of each chicken breast, fully covering the surface. Then, spoon the mayonnaise-sour cream-Parmesan mixture evenly over each piece of chicken, spreading it out to cover the cheese.

Bake the chicken: Place the baking dish in the preheated oven and bake for 25-30 minutes, or until the chicken reaches an internal temperature of 165°F (74°C) and the cheese topping is golden and bubbly.

Broil for extra color (optional): If you'd like a deeper golden color, switch the oven to broil for the last 2-3 minutes of baking.

Serve and enjoy: Once baked to perfection, remove the dish from the oven and let the chicken rest for 5 minutes. Serve hot with your favorite side dishes like roasted vegetables, salad, or pasta.