It is the most expensive spice of all. It has a distinctively pungent, honey-like flavor and aroma. It is available as whole threads or powdered. When ground they form a russet powder. The filaments can be lightly roasted, crumbled in a little hot water and left to infuse to bring out their full strength. Kesar or Saffron is used to color rice dishes, sweets, puddings, sauces and soups to bright yellow.