I don't know how they make this popcorn soap over at River City Soaps, but it looks exactly like popcorn, and apparently smells like it too! Fantastic!! I HEART popcorn :D
Stop by their Etsy shop to read all about it. While you're there take a look at all their other great handmade soaps, and with names like Tomato Leaf, Nagging Wife, Dragon's Blood, and Chai Tea, they're pretty unique too!