Start by preheating your oven to a warm 425°F (220°C). Lightly coat a 9x13-inch baking dish with non-stick cooking spray, ensuring nothing sticks.
Gently pound the thicker parts of the chicken breasts until they are about 3/4-inch thick. This simple step helps them cook evenly and ensures they stay wonderfully tender.
In a small bowl, whisk together the garlic powder, dried thyme, onion powder, dried oregano, paprika, chili powder, 3/4 teaspoon of salt, and 1/2 teaspoon of black pepper. This creates your flavorful seasoning blend.
Place the chicken breasts in the prepared baking dish. Brush both sides of each chicken breast with olive oil.
Generously sprinkle your delicious spice mixture evenly over both sides of the chicken, making sure every piece is well coated for maximum flavor.
Bake in the preheated oven for about 16 to 20 minutes, or until an instant-read thermometer inserted into the thickest part of the chicken registers 165°F (74°C). Don't overcook to keep it juicy!
Once cooked, carefully remove the chicken from the oven and let it rest for 5 minutes before slicing and serving. This quick rest allows the juices to redistribute, ensuring every bite is moist and flavorful! Optionally, sprinkle with fresh parsley before serving for a touch of freshness.