Begin by preheating your oven to a toasty 425°F (220°C).
Take your chicken thighs and carefully pat them dry with paper towels; this step is crucial for achieving that delightfully crispy skin.
In a small mixing bowl, combine the olive oil, garlic powder, onion powder, smoked paprika, dried thyme, chili powder, sea salt, and freshly cracked black pepper. Mix well to create a flavorful spice rub.
Generously massage the spice mixture all over the chicken thighs, ensuring you lift the skin slightly to coat the meat beneath for a depth of flavor.
Arrange the seasoned chicken thighs skin-side up on a prepared baking sheet lined with parchment paper or in a well-seasoned cast-iron skillet, spaced apart to allow heat circulation.
Place the baking sheet in the preheated oven and bake for 35-40 minutes. The meat should reach an internal temperature of 165°F (75°C), and you'll know they are ready when the skin turns a delightful crispy golden-brown.
For an extra crunch, if desired, switch your oven to broil and crisp the skin for an additional 2-3 minutes, keeping a vigilant watch to prevent any burning.
Once baked to perfection, remove the chicken from the oven and allow it to rest for about 5 minutes. This lets the juices settle back into the meat, enhancing the flavor.
Finally, garnish your succulent chicken thighs with fresh rosemary sprigs; they add a beautiful touch and an aromatic flair to your dish.
Notes
For extra crunch, broil for a few minutes at the end.