Nutella was invented during WW2 when an Italian pastry maker mixed hazelnuts into chocolate to extend his cocoa supply.
The product that became Nutella was created by an Italian bakery owner called Pietro Ferrero in the 1940s. He decided to try and create a cheaper alternative to chocolate, which, due to the Second World War, was in short supply. It was made by combining hazelnuts, which were easily available locally, and a little cocoa.
The product began life as a solid block called pasta gianduja which could be sliced and served on bread but later evolved into a spreadable version called Supercrema.
The Nutella name came about as a result of combining the English word 'nut' and the Latin suffix for sweet – 'ella'.