Preheat the oven to 375°F (190°C). Gently coat a baking dish with oil or cover it with parchment paper to simplify cleanup.

Prepare the chicken: Pat the chicken breasts dry with a paper towel and place them in the prepared baking dish in a single layer.

Make the creamy topping: In a small mixing bowl, combine the mayonnaise or Greek yogurt, parmesan cheese, seasoning salt, black pepper, and garlic powder. Stir until well blended.

Coat the chicken: Spread the creamy mixture evenly over each chicken breast, ensuring they are fully coated.

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 (75°C) and the topping is golden brown and bubbly.

Optional finishing step: For a crispier top, switch to broil mode for the last 2-3 minutes, watching carefully to prevent burning.

Rest and serve: Remove the chicken from the oven and let it rest for 5 minutes before serving. This ensures the juices settle, making the chicken even more tender.