Roasted Chicken Wings

20 to 30 chicken wings
1 cup firmly packed brown sugar
1 cup soy sauce
1 teaspoon dry mustard
1 teaspoon crushed red pepper
1/2 teaspoon five-spice powder
3/4 cup butter, for basting

Cut chicken wings at joints. Discard tips. Combine all ingredients except butter. Marinate chicken for 8 to 24 hours in the refrigerator.