Begin your journey by preheating your oven to 400°F (200°C). This step is crucial. A hot oven helps to lock in moisture while ensuring a nice golden crust.

While the oven heats, take your chicken breasts and pat them dry with paper towels. This simple action removes excess moisture, which promotes browning.

Place the chicken in a large zip-top bag or on a cutting board. Using a meat mallet: gently pound each breast until they are an even thickness. Aim for about 1/2 inch. This ensures even cooking.

In a mixing bowl, combine olive oil (or melted butter) with the herbs, paprika, onion powder, roasted garlic powder, salt, and pepper. Whisk until well blended. This is where the real flavor magic happens.

Take your flattened chicken and transfer it into the bowl with the marinade. Toss to coat thoroughly, ensuring every inch is covered. If time allows, let this marinate for at least 30 minutes, or even up to 2 hours in the refrigerator.

Line a baking dish with parchment paper for easy cleanup. Layer the marinated chicken breasts in the dish. Bake in the preheated oven for about 20-25 minutes, depending on the thickness of the breasts.

To ensure perfect doneness, use a meat thermometer to check that the internal temperature reaches 165°F (75°C).

Once out of the oven, let the chicken rest for about 5-10 minutes. This resting period allows juices to redistribute, keeping your chicken moist. Slice, serve, and enjoy!