Chopped parsley for garnish
1/4 cup heavy cream
1 1/2 cups chicken broth
1/2 cup marsala wine
1 tsp. finely chopped rosemary
1 tsp. chopped garlic
1/2 cup diced onion
10 oz. button mushrooms, cleaned and sliced
2 tbsp. butter
2 tbsp. olive oil
1/2 cup flour, plus 1 tablespoon, divided
1 tsp. garlic powder
Kosher salt and fresh black pepper to taste
2 pounds chicken breast, cut in half lengthwise if thick