Dr. Bronners Bar Soap Peppermint 5ozDr. Bronner’s Peppermint Bar Soap. Our most popular scent with a peppermint burst so pure it tingles! Scented with organic peppermint oil to cool skin, clear sinuses, and sharpen the mind. Our Peppermint Pure-Castile Bar Soap is made with certified fair trade ingredients and organic hemp oil for a soft, smooth lather that won’t dry your skin. 100% biodegradable in a 100% post-consumer recycled wrapper.