Saffron is known as “the king of spices,” and as the world’s most expensive spice. Saffron is made from the dried stigmas of the flower species crocus. Each flower of the crocus sativus has only three pistils, and these must be picked by hand. Over 70,000 flowers are required to yield 1 lb of saffron. It has been used since classical times as a flavoring in food and wine.