Commercial Description: Pure cane sugar. Sioux Citys Sarsaparilla is our classic, creamy root beer. Its been twice voted the best root beer in America by The Root Beer Report. Hey, its not called the granddaddy of all root beers for nothing. So grab yourself a bottle of the best from the west - this is Sioux City. Authentic saloon style sarsaparilla. The granddaddy of all root beers.