Prepare Chicken Cutlets:
Slice each chicken breast lengthwise into 2 even halves, yielding 4 thinner cutlets. Season both sides with garlic powder, salt, and pepper, then coat lightly in flour.Preheat Oven to 400°F:
Heat the oven to 400°F (205°C) and position a rack in the upper third.Sear Chicken Golden Brown:
In a skillet over medium-high heat, warm the olive oil and 1 tablespoon of butter. Sear the chicken for 4-5 minutes per side until golden brown, then set aside on a plate.Cook Mushrooms Until Browned:
Melt the remaining 2 tablespoons of butter in the same skillet. Add the sliced mushrooms and cook for about 5-6 minutes until they release moisture and develop a good sear.Simmer Wine and Broth:
Pour in the wine, chicken broth, and Italian seasoning. Let the liquid simmer for roughly 1 minute while scraping up any browned bits from the bottom.Return Chicken to Skillet:
Return the chicken to the skillet, spooning the mushroom sauce over the top. Take the pan off the heat.Top with Parmesan and Mozzarella:
Sprinkle the parmesan over the chicken, followed by the mozzarella. Distribute most of the cheese on the chicken; any excess can go into the sauce.Bake and Broil Until Browned:
Place the skillet in the oven and bake for 5 minutes. Then switch to broil and cook for a couple more minutes until the cheese is browned. Alternatively, skip broiling and bake for 7 minutes total until the chicken reaches an internal temperature of 165°F (75°C).Garnish and Serve Immediately:
Take out of the oven, garnish with fresh parsley, and serve right away, spooning the pan juices over rice or mashed potatoes.