01 - Pat the chicken thighs dry with paper towels and season generously on both sides with salt and freshly ground black pepper.
02 - Heat olive oil and butter in a large skillet over medium-high heat until the butter melts and begins to foam.
03 - Place the chicken thighs skin side down in the skillet and sear for 5 to 6 minutes per side until the skin is golden brown and crisp. Remove the chicken from the skillet and set aside on a plate.
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 cook for 1 minute until fragrant, stirring constantly to prevent burning.
05 - Pour in the chicken broth, using a wooden spoon to scrape up any browned bits from the bottom of the skillet. Let the broth simmer for 1 to 2 minutes.
06 - Reduce the heat to medium-low. Stir in the heavy cream, dried thyme, dried rosemary, dried oregano, and chopped parsley. Mix until well combined and the sauce is smooth.
07 - Return the seared chicken thighs to the skillet, placing them skin side up. Spoon some of the cream sauce over the top of each thigh.
08 - Cover the skillet with a lid and simmer over medium-low heat for 15 minutes, or until the chicken reaches an internal temperature of 165°F and the sauce has thickened to a creamy consistency.
09 - Taste the sauce and adjust the seasoning with additional salt and pepper if needed. Garnish with extra fresh parsley and serve immediately.