Saffron is the worlds most expensive spice and is beloved by users for its honey-like aroma decadent sweet flavor and excellent ability to richly color dishes it is used in. Saffron is relatively expensive to produce and collect because the flowers that Saffron is derived from only produce 3 stigmas which are the threads that constitute the spice. Saffron is famously used in Spanish Paella. | Saffron is the worlds most expensive spice. Sought after for its flavor aroma and beautiful color.