01 - Pat the chicken thighs dry with paper towels and season both sides generously with salt and freshly ground black pepper.
02 - Heat the olive oil and butter in a large skillet with a lid over medium-high heat until the butter is melted 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 crispy. Remove the chicken from the skillet and set it 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 frequently to prevent burning.
05 - Pour in the chicken broth, scraping up any browned bits from the bottom of the skillet to release the fond and build flavor.
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 piece.
08 - Cover the skillet with the lid and simmer gently for 15 minutes, or until the chicken is cooked through to an internal temperature of 165°F and the sauce has thickened to a luxurious consistency.
09 - Taste the sauce and adjust the seasoning with salt and pepper if needed. Garnish with additional fresh parsley and serve immediately over mashed potatoes, rice, or alongside crusty bread.