01 - Preheat oven to 400°F (200°C). Position the rack in the center of the oven.
02 - Pat the chicken thighs thoroughly dry with paper towels. Combine salt, black pepper, smoked paprika, dried thyme, and dried basil in a small bowl. Rub the seasoning blend evenly over all surfaces of each chicken thigh.
03 - Melt the butter in a large oven-safe skillet over medium-high heat. Place the chicken thighs skin side down and sear for 3–4 minutes until the skin is deeply golden and crisp. Flip each thigh and sear the opposite side for 2 minutes. Transfer the chicken to a plate and set aside.
04 - In the same skillet, add the chopped onion and sauté over medium heat for 2 minutes until softened. Add the minced garlic and cook for 1 minute, stirring constantly, until fragrant.
05 - Pour in the chicken broth, scraping up any browned bits from the bottom of the skillet. Stir in the heavy cream and Parmesan cheese, whisking gently until the sauce is smooth and slightly thickened, about 2 minutes.
06 - Nestle the seared chicken thighs back into the skillet, skin side up. Spoon some of the cream sauce over the top of each thigh to baste.
07 - Transfer the uncovered skillet to the preheated oven. Bake for 25–30 minutes, or until the chicken registers an internal temperature of 165°F (74°C) and the sauce is bubbling around the edges.
08 - Remove from the oven and let rest for 2–3 minutes. Garnish with freshly chopped parsley and serve immediately while hot.