I love experimenting with shortbread doughs and if you look in my cooking blog, you'll find lots of them! Here, the fact of making a hazelnut butter, changes completely the taste and the texture of the shortbread. With a touch of vanilla and salt, they are irresistible! The texture is a bit similar to the montecaos I had previously posted. These shortbread will keep for a very long time without any problem in an airtight box.