In a medium bowl, whisk together bourbon, soy sauce, honey, minced garlic, olive oil, salt, and pepper until well combined. Place the chicken thighs in a resealable bag, pour the marinade over them, seal tightly, and refrigerate for at least 1 hour, ideally overnight.

Preheat your oven to 400°F (200°C) to ensure even cooking.

Heat 2 tablespoons of olive oil in a large oven-safe skillet over medium-high heat. Sear the marinated chicken thighs skin-side down for about 5-7 minutes until golden.

Turn the chicken thighs over, add fresh blackberries around them, and transfer the skillet to your preheated oven. Bake for 25-30 minutes until internal temperature reaches 165°F (75°C).

Let the chicken rest for about 5 minutes, then serve with pan juices spooned over the top.