01 - Preheat oven to 400°F. Grease a baking dish with olive oil or nonstick spray.
02 - Season chicken breasts with salt, pepper, paprika, and thyme on both sides.
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 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 evenly over the top.
06 - Bake uncovered for 25-30 minutes, or until chicken is cooked through (internal temp 165°F) and cheese is bubbly and golden.
07 - Rest for 5 minutes before serving. Garnish with fresh herbs, if desired.