01 - Whisk together buttermilk, olive oil, garlic, salt, pepper, smoked paprika, thyme, oregano, cayenne (if using), and lemon zest in a large bowl until thoroughly combined.
02 - Submerge chicken pieces in the marinade, turning to coat completely. Cover and refrigerate for at least 8 hours or overnight for optimal flavor penetration.
03 - Preheat oven to 425°F. Line a large baking sheet with parchment paper or foil and place a wire rack on top.
04 - Remove chicken from marinade, allowing excess to drip off. Arrange pieces skin-side up on the wire rack. Discard used marinade.
05 - Brush chicken lightly with olive oil and sprinkle with additional freshly ground black pepper.
06 - Roast for 40-45 minutes until golden brown and juices run clear. Internal temperature should reach 165°F when tested with a meat thermometer.
07 - Let chicken rest for 5 minutes to allow juices to redistribute. Garnish with fresh parsley and serve with lemon wedges.