01 - Whisk buttermilk, salt, black pepper, garlic powder, and smoked paprika in a large bowl. Add chicken pieces, turning to coat thoroughly. Cover and refrigerate for at least 30 minutes or overnight for optimal flavor.
02 - Preheat the oven to 425°F. Line a baking sheet with parchment paper and place a wire rack on top.
03 - Combine panko breadcrumbs, flour, onion powder, dried thyme, cayenne pepper, salt, and black pepper in a shallow dish.
04 - Remove chicken from the marinade, allowing excess liquid to drip off. Press each piece firmly into the breadcrumb mixture to ensure an even coating adheres.
05 - Place the coated chicken pieces skin-side up on the prepared wire rack. Drizzle the olive oil evenly over the top to enhance crispiness.
06 - Bake for 35 to 40 minutes until the chicken is golden, crisp, and cooked through. The internal temperature should reach 165°F. Allow the chicken to rest for 5 minutes before serving.