Healthy Baked Parmesan Paprika Chicken

use coconut flour.1/4 cup all-purpose flour 1/2 cup grated Parmesan cheese 2 teaspoons paprika 1/2 teaspoon salt 1/2 teaspoon black pepper 1 egg, beaten 2 tablespoons milk 4 skinless, boneless chicken breast halves 1/4 cup butter, melted