Most expensive foods in the world, most expensive drinks, deserts or spices.
Saffron, a spice grown worldwide, is derived from the saffron crocus flower. Prices for the spice go around US$500/pound to US$5,000/pound (US$1100 to US$11,000 per kilogram).
Macadamia nut. The cost of a kilogram of these nuts exceeds 30$.
Iranian caviar. The luxurious caviar comes from the oldest survivor of the Dinosaur era. Beluga caviar ranges in price from more than $5,000 per kilogram in the United States.
White truffle. This mushrooms are sold at a amazing price of 2,000 and 4,000 per kilogram ($1350 $2700 per pound).
La Bonnotte French potato. The cost of one single kilogram can reach $500 since this type of potato is almost extinct.