01 - Season the chicken pieces with salt and pepper, then toss with flour until evenly coated on all sides.
02 - Heat 1 tablespoon olive oil and the butter in a large skillet over medium-high heat. Add the chicken pieces and sear until golden brown on all sides, about 4 to 5 minutes. Remove the chicken and set aside.
03 - In the same skillet, add the remaining tablespoon of olive oil. Sauté the shallot and garlic for about 1 minute until fragrant and softened.
04 - Add the sliced mushrooms and cook until they release their liquid and begin to brown, about 4 to 5 minutes.
05 - Return the seared chicken to the skillet. Pour in the Marsala wine, scraping up any browned bits from the bottom of the pan. Allow the wine to reduce by half, about 2 minutes.
06 - Add the chicken broth and dried thyme. Simmer until the sauce thickens and the chicken is cooked through, 5 to 7 minutes.
07 - Stir in the chopped parsley. Taste the sauce and adjust salt and pepper as needed.
08 - Serve warm, garnished with additional fresh parsley. Pairs well with rice, pasta, or mashed potatoes.