01 - Preheat oven to 400°F. Position the rack in the center.
02 - Pat chicken thighs thoroughly dry with paper towels. Combine salt, pepper, smoked paprika, thyme, and basil, then season all sides of each thigh evenly.
03 - Melt butter in a large oven-safe skillet over medium-high heat. Place chicken skin-side down and sear for 3 to 4 minutes until deeply golden. Flip and sear the opposite side for 2 minutes. Transfer chicken to a plate and set aside.
04 - In the same skillet, sauté onion for 2 minutes until softened. Add garlic and cook 1 minute until fragrant. Pour in chicken broth, scraping up all browned bits from the bottom. Stir in heavy cream and Parmesan cheese until the sauce is smooth and slightly thickened.
05 - Nestle the chicken thighs back into the skillet, skin-side up. Spoon sauce over each piece. Transfer the skillet to the 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 from the oven, garnish generously with fresh chopped parsley, and serve immediately.