Preheat oven to 425 degrees fahrenheit.
Combine brown sugar, paprika, oregano, parsley, salt, garlic powder, onion powder, pepper and chili powder (if desired) together into a small bowl.
Line a baking sheet with parchment paper. Toss chicken in the dry mixture and place onto the baking sheet. Drizzle the chicken with oil and spread extra dry mixture onto the tops of the chicken breasts.
Bake chicken for about 15 minutes or until the internal temperature reaches a minimum of 165 degrees fahrenheit.
Remove the parchment paper from the baking pan and broil the chicken on high heat for two minutes. This will give it a crisp outer coating that is sure to bake on the seasoning and keep the chicken moist inside.
While cooking the chicken in the oven, sauté butter and garlic cloves in a small skillet.
Remove chicken from oven and drizzle with juices from skillet. Serve while warm.