Preheat oven to 400 F. Lightly grease a 9x13 baking dish with cooking spray or butter and set aside.
Heat a skillet over medium-high heat. Once hot, add oil and then sear the chicken thighs on both sides until browned, about 3-4 minutes each side. It does not need to be fully cooked, just enough to make the skin crispy.
2 tablespoons avocado oil, 3 pound bone-in chicken thighs with skin
Place the chicken thighs into the prepared baking pan with the skin side up.
In a small bowl, combine the lemon sauce ingredients with the salt and pepper. Mix well.
2 tablespoons butter, 3-5 garlic cloves, 2 tablespoons fresh rosemary, 2 large lemons, 2 teaspoons lemon zest, 1/2 teaspoon garlic powder, 1 1/2 teaspoons salt, 1 teaspoon black pepper
Pour mixture over the chicken, then add extra sprigs of rosemary and lemon slices.
Fresh rosemary, Lemon slices
Cook the chicken uncovered for 25-30 minutes, or until the internal temperature reaches 165 degrees and the juices run clear.
Spoon the lemon rosemary sauce over the chicken. Serve over mashed potatoes or rice and with a veggie on the side. Enjoy!