La Tienda in the Press
Gourmet - April 11, 2012
Eight of the World's Most Expensive IngredientsMost Expensive Spice: Saffron
What: Saffron is derived from a type of crocus that grows most extensively in the Mediterranean and Middle East. Its brightly hued threads are graded for quality by the Switzerland-based International Organization for Standardization (ISO), which ranks the product on a scale from 0 to 250 based on color, fragrance, and taste.