World's Smelliest Spice - Aramco World Article

First mentioned in an inventory of the gardens of Babylon in the eighth century BC, "Devil's Dung" the world's smelliest spice has a smell described in this Aramco World article as: "a sulfurous blend of manure and overcooked... cabbage, all with the nose-wrinkling pungency of a summer dumpster." When heated in oil however it disintegrates and exudes "a rich, savory scent, reminiscent of sauteed onions."

http://www.saudiaramcoworld.com/issue/200904/devil.s.dung-the.world.s.smelliest.spice.htm