The plain cracker, sold by Henry Aldridge & Son auctioneers in Devizes in Wiltshire, fetched 5,000 ($7656) more than was expected. It was bought by a collector in Greece, the BBC reported.
Auctioneer Andrew Aldridge told The Salisbury Journal: 'It is the world's most valuable biscuit. We don't know which lifeboat the biscuit came from but there are no other Titanic lifeboat biscuits in existence to my knowledge.'
The Spillers and Bakers 'Pilot' biscuit survived the sinking of the Titanic in 1912 in which over 1,500 people died after the 'unsinkable' ship hit an iceberg.
According to auctioneers, the sweet was part of a survival kit that was stored within one of the ill-fated ocean liner's lifeboats.
James Fenwick, a passenger onboard the SS Carpathia, which went to the aid of survivors from the ship kept it as a 'souvenir' of the disaster.
He put the snack in a Kodak photographic envelope and wrote a note which stated 'Pilot biscuit from Titanic lifeboat April 1912'.