01 - Preheat oven to 400°F. Position rack in the center of the oven.
02 - Pat chicken thighs dry with paper towels. Combine salt, 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 butter in a large oven-safe skillet over medium-high heat. Place chicken thighs skin side down and sear for 3 to 4 minutes until the skin is deeply golden and crisp. Flip and sear the opposite side for 2 minutes. Transfer chicken to a plate and set aside.
04 - In the same skillet, add chopped onion and sauté for 2 minutes until softened. Add minced garlic and cook for 1 minute until fragrant, stirring constantly to prevent browning.
05 - Pour in chicken broth, scraping up any browned bits from the bottom of the skillet. Stir in heavy cream and grated Parmesan cheese. Continue stirring 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.
07 - Transfer the uncovered skillet to the oven. Bake for 25 to 30 minutes until the chicken reaches an internal temperature of 165°F and the sauce is bubbly and reduced.
08 - Remove from the oven and let rest for 2 to 3 minutes. Garnish with freshly chopped parsley and serve immediately, spooning extra sauce from the skillet over each portion.