Start by slicing the chicken breasts in half lengthwise to create thin cutlets. Season them evenly with salt and pepper, then dredge lightly in flour. I always shake off the excess flour so the coating stays light and delicate.
Heat olive oil and butter in a large skillet over medium-high heat. Add the chicken and cook until golden on both sides, about 4–5 minutes per side. Once done, remove the chicken and set it aside so it stays juicy.
In the same skillet, add the sliced mushrooms. Let them cook until they release their moisture and turn golden. This step adds deep, savory flavor to the sauce, so don’t rush it.
Stir in the minced garlic and cook briefly until fragrant. Pour in the marsala wine, scraping up the browned bits from the pan. This step builds the foundation of the sauce and adds complexity.
Add the chicken broth and let the sauce simmer for a few minutes until slightly reduced. Then stir in the heavy cream, allowing the sauce to thicken gently without boiling too hard.
Return the chicken to the skillet and spoon the sauce over it. Let everything simmer together for a few minutes so the chicken absorbs the flavors. Finish with fresh parsley before serving.