In a small bowl, mix together the smoked paprika, garlic powder, onion powder, dried thyme, salt, and black pepper.
Pat the chicken thighs dry with paper towels for crispy skin.
In a large mixing bowl, coat the chicken thighs with olive oil. Sprinkle the spice mixture evenly over the chicken, ensuring all sides are well-covered.
Arrange the chicken thighs in a single layer in a baking dish. Place lemon slices on top of and around the chicken for added flavor.
Bake in the preheated oven for 35-40 minutes, or until the chicken reaches an internal temperature of 165°F (74°C) and the skin is crispy and golden brown.
Once done, remove from the oven and let the chicken rest for about 5 minutes.
Garnish with fresh rosemary before serving.
Notes
Let the chicken rest before serving for better flavor.