"X" is the second most expensive spice is the world after Saffron.Despite the expense, "X" is highly valued for its flavor, which author Frederic Rosengarten, Jr. described in The Book of Spices as "pure, spicy, and delicate" and its complex floral aroma depicted as a "peculiar bouquet". "X" is widely used in both commercial and domestic baking, perfume manufacture and aromatherapy.
Id X
Answer (highlight to read) : "X" - Vanilla