01 - Preheat oven to 400°F. Grease a 9×13-inch baking dish with olive oil or nonstick spray.
02 - Season chicken breasts with salt, pepper, paprika, and thyme on both sides, pressing gently to adhere.
03 - In a large skillet over medium heat, melt butter with olive oil. Add mushrooms and sauté for 4-5 minutes until softened and lightly browned. Stir in garlic; cook for 1 more minute until fragrant.
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 the chicken, not over it.
05 - Sprinkle mozzarella and Parmesan cheeses evenly over the top, covering the chicken and mushrooms.
06 - Bake uncovered for 25-30 minutes, or until chicken is cooked through (internal temperature reaches 165°F) and cheese is bubbly and golden brown.
07 - Let rest for 5 minutes before serving to allow juices to redistribute. Garnish with fresh herbs if desired.