Place the skin-side down chicken thighs on top and cook for 5 to 7 minutes, or until golden brown. Cook for a further five minutes after flipping. After removing it from the skillet, set the chicken aside.
Add the butter and mushrooms to the same skillet. Cook for 5 to 7 minutes, or until the mushrooms are soft and golden brown. When the garlic is aromatic, add the minced garlic to the skillet and heat for an additional minute.
After taking out of the skillet, transfer the chicken thighs to a dish for serving. Evenly spoon the chicken with the mushroom Marsala sauce. Add some chopped parsley as a garnish and serve hot, accompanied by mashed potatoes or cooked pasta if preferred.