01 - Preheat oven to 400°F. Grease a 9×13-inch baking dish with olive oil or nonstick spray.
02 - Season chicken breasts on both sides with salt, pepper, paprika, and thyme.
03 - In a large skillet over medium heat, melt butter with olive oil. Add mushrooms and sauté for 4-5 minutes until softened. Stir in garlic; cook for 1 more minute.
04 - Remove mushrooms from heat. Arrange seasoned chicken breasts in the prepared baking dish. Spread sautéed mushrooms evenly over the chicken. Pour chicken broth around (not over) the chicken.
05 - Sprinkle mozzarella and Parmesan cheeses evenly over the chicken and mushrooms.
06 - Bake uncovered for 25-30 minutes, or until chicken reaches an internal temperature of 165°F and cheese is bubbly and golden brown.
07 - Let the dish rest for 5 minutes before serving. Garnish with fresh herbs if desired.