Hashish also referred to simply as hash, is a cannabis concentrate that’s typically inhaled or smoked. Hashish can be made using a few different methods, but the essential steps are removing the trichome glands from a cannabis plant and repeatedly compressing them to form a hardened, solid piece. It’s arguably one of the oldest types of cannabis concentrates, with written texts referring to hashish dating as far back as the 12th and 13th centuries. The varying look and feel of hashish are closely tied to its history and the method used to make it.