Prep the Chicken:
Season chicken with salt and pepper, then dredge lightly in flour, shaking off excess.
Sear the Chicken:
Heat olive oil and 1 tablespoon butter in a large skillet over medium-high heat.
Cook chicken 4–5 minutes per side until golden and cooked through. Remove and set aside.
Cook Mushrooms:
In the same pan, melt remaining 1 tablespoon butter. Add mushrooms and cook 5–6 minutes until browned. Add garlic and sauté for 1 minute.
Deglaze and Simmer:
Pour in Marsala wine and chicken broth, scraping up browned bits. Simmer for 5 minutes to reduce slightly.
Make It Creamy (Optional):
Stir in heavy cream and simmer 2–3 more minutes until the sauce thickens slightly.
Return Chicken:
Return chicken to the pan and spoon sauce over top. Simmer for another 3 minutes until everything is heated through.
Serve:
Garnish with chopped parsley and serve over mashed potatoes, pasta, or rice.