01 - Preheat oven to 400°F. Position rack in the center of the oven.
02 - Pat chicken thighs dry with paper towels. Season generously on all sides with salt, black pepper, smoked paprika, dried thyme, and dried basil, pressing the spices into the skin.
03 - Melt butter in a large oven-safe skillet over medium-high heat. Place chicken thighs skin side down and sear for 3-4 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, reduce heat to medium. Add the chopped onion and sauté for 2 minutes until softened. Add the minced garlic and cook for 1 minute until fragrant, stirring constantly to prevent burning.
05 - Pour in the chicken broth, scraping up any browned bits from the bottom of the pan. Stir in the heavy cream and grated Parmesan cheese, whisking gently until the sauce is smooth and slightly thickened.
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 preheated oven. Bake for 25-30 minutes until the chicken reaches an internal temperature of 165°F and the sauce is bubbly and golden at the edges.
08 - Remove from the oven, garnish with freshly chopped parsley, and serve immediately while hot.