Season the Chicken: In a small bowl, mix the onion powder, garlic powder, dried thyme, dried rosemary, salt, and pepper. Rub this seasoning mixture evenly over both sides of the chicken thighs.

Cook the Chicken: In a spacious skillet, warm up some olive oil over a medium flame. Once it's hot, add the chicken thighs and sear them for 5-7 minutes per side, or until they achieve a rich, golden crust and are fully cooked. Once done, take the chicken out and set it aside for now.

Sauté the Mushrooms: Using the same skillet, drop in the butter and let it melt smoothly. Toss in the sliced mushrooms and sauté them for about 5-6 minutes, stirring occasionally, until they soften, release their juices, and turn a beautiful golden brown.

Prepare the Garlic Herb Sauce: Add the minced garlic to the skillet with the mushrooms and sauté for 1 minute until fragrant. Stir in the dried thyme, dried rosemary, and fresh parsley.

Combine Chicken and Sauce: Return the cooked chicken thighs to the skillet, spooning the mushroom and garlic sauce over them. Simmer on low for 2-3 minutes to meld the flavors.

Serve: Serve warm, garnished with extra parsley if desired. Pair with rice, pasta, or crusty bread to soak up the flavorful sauce.