Can also be spelled nocciuole, and used in many desserts and biscotti. Many of Italy's grow in Piedmont, where they get made into Nutella. The nocciola gentile romana from north of Rome is a DOP product.
Nocciolini can be hazelnut cookies (famous nocciolini di Chivasso, made with egg yolks), various kinds of hazelnut pastries or candies, or in Puglia, hazelnut ice cream affogato in coffee.
Image by Fabrizio Monte