Combine soy sauce, olive oil, lemon juice, pepper and garlic in a large resealable bag. Add the molasses last as it tends to stick to the outside of the bag. Seal and shake. Add your chicken thighs. Seal, and chill 8 to 24 hours adjusting thighs periodically. When you are ready to bake remove chicken from marinade, and discard. Prepare a foil lined baking sheet with a rack coated in cooking spray. Place chicken thighs on the rack, evenly spaced. Bake at 425 degrees for between 35-40 minutes.