01 - Pat the chicken thighs thoroughly dry with paper towels. Season both sides generously with salt and freshly ground black pepper.
02 - Set a large skillet over medium-high heat. Add the olive oil and butter, allowing the butter to melt and begin foaming.
03 - Place the chicken thighs skin side down in the hot skillet. Sear for 5 to 6 minutes per side until the skin turns a deep golden brown and releases easily from the pan. Transfer the chicken to a plate and set aside.
04 - In the same skillet, add the diced onion and cook for 2 to 3 minutes until softened and translucent. Add the minced garlic and stir for 1 minute until fragrant, being careful not to let it brown.
05 - Pour in the chicken broth, using a wooden spoon to scrape up all the browned bits from the bottom of the pan. Let the liquid reduce slightly for about 1 minute.
06 - Reduce the heat to medium-low. Stir in the heavy cream, dried thyme, dried rosemary, dried oregano, and chopped parsley. Whisk gently until the sauce is smooth and well combined.
07 - Return the seared chicken thighs to the skillet, arranging them skin side up. Spoon some of the cream sauce over the top of each piece.
08 - Cover the skillet with a tight-fitting lid and reduce the heat to a gentle simmer. Cook for 15 minutes, or until the chicken reaches an internal temperature of 165°F and the sauce has thickened to a luxurious consistency.
09 - Taste the sauce and adjust the salt and pepper as needed. Transfer to serving plates and garnish with additional fresh parsley. Serve immediately alongside mashed potatoes, rice, or crusty bread.