What is the most expensive food per pound? Caviar? Certain truffles?

Truffles and Beluga caviar are way out of most people's reach, but the most expensive food item in the world, ounce for ounce, is the spice Saffron.

http://sgfoodies.blogspot.com/2007/09/food-trivia.html

Truffles is considered the most expensive according to this site.

The record price paid for 'White truffle' was $330,000 ( 1.5 kg) by Stanley Ho.

http://www.wackyarchives.com/featured/worlds-most-expensive-foods.html

The following site provides 21 of the most expensive food products in the world.

There are contradicting answers from websites but:

Saffron, a spice/herb for food, has been sold from $500 to $5,000 per pound due to the resources and labor. Beluga caviar has been sold for $2,400 per pound. The white truffle (a mushroom) was once sold for about 3.3 pounds at $330,000 to a casino (assuming my math is correct) that is roughly $100,000 per pound. Lastly, there was also a fruitcake that was sold for $1.65 million.

http://www.wackyarchives.com/featured/worlds-most-expensive-foods.html
ask.yahoo.com/20060106.html no longer exists

Mushrooms...

http://most-expensive.net/foods

Though one would suspect that particular dishes in top hotels and bistros probably have time limited 'specials'.

Not mentioned in the link, but I think there was a dessert somewhere in the Middle East made out of platinum that was just criminal and affront to humanity at it's price.

Hoyts Saffron is considerably more expensive. In an Australian supermarket it is shown at $1212 per 10 grams which makes it $121,200 per kilogram.

http://www.danielbowen.com/2011/06/22/unit-pricing-expensive/

Black Ivory Coffee at 1,090 dollars a pound.
http://www.cbc.ca/news/world/story/2012/12/07/wrd-thailand-elephant-coffee.html

It's white truffles, which sold for $160,000 for a single one, weighing about three pounds.

http://most-expensive.net/foods