Gianduja or gianduia (Italian: [dʒanˈduːja]) is a sweet chocolate containing about 30% hazelnut paste, invented in Turin during Napoléon's regency (1796–1814). Based on Gianduia, Turin based chocolate manufacturer Caffarel invented Gianduiotto in 1852. It takes its name from Gianduja, a Carnival and marionette character who represents the archetypal Piedmontese, a native of the Italian region where hazelnut confectionery is common.
Gianduiotti, a speciality of Turin, are chocolates shaped like an upturned boat, again made with a mixture of cocoa and hazelnut paste. Invented by Caffarel in 1852, it is still a trade mark for the company
Nutella, which was originally called Pasta Gianduja.