01 - Preheat oven to 400°F. Position the rack in the center of the oven for even heat distribution.
02 - Pat the chicken thighs thoroughly dry with paper towels. Combine the salt, black pepper, smoked paprika, dried thyme, and dried basil, then season all sides of each thigh evenly.
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 to 4 minutes until the skin is golden brown and crisp. Flip each thigh and sear the opposite side for 2 minutes. Transfer the chicken to a plate and set aside.
04 - Reduce the heat to medium. Add the chopped onion to the same skillet and sauté for 2 minutes until softened. Stir in the minced garlic and cook for 1 minute until fragrant. Pour in the chicken broth, scraping up any browned bits from the bottom of the pan. Add the heavy cream and Parmesan cheese, stirring continuously until the sauce is smooth and slightly thickened.
05 - Nestle the seared chicken thighs back into the skillet, skin side up. Spoon some of the sauce over the top of each thigh. Transfer the skillet to the preheated oven and bake uncovered for 25 to 30 minutes, until the chicken reaches an internal temperature of 165°F and the sauce is bubbling.
06 - Remove the skillet from the oven. Garnish generously with freshly chopped parsley and serve immediately while hot.