One skillet, mushroom wine sauce, tender chicken. Marsala is that Italian classic that makes you look like a better cook than you probably are. High protein bonus.
Pound the chicken breasts to even thickness, then dredge each piece in the all-purpose flour; shake off excess.
Heat olive oil and 1 tablespoon butter in a large skillet over medium-high; add chicken and cook until golden brown on both sides, 3–4 minutes per side. Remove and keep warm.
Add remaining butter to the skillet; sauté mushrooms over medium heat for 5–6 minutes until softened and browned, stirring occasionally.
Pour Marsala wine into the skillet and scrape up any browned bits; simmer for 2 minutes, then add chicken broth, salt, and pepper. Reduce heat to medium-low.
Return chicken to the skillet, cover, and cook for 6–7 minutes until chicken is cooked through and sauce has thickened slightly. Remove from heat and garnish with parsley before serving.