Rich, nutty and irresistibly moreish, the Chocoviar Pistachio bar by Venchi 1878 transforms one of its most iconic creations into a decadent new form. Whole pistachios are enveloped in a creamy pistachio and hazelnut paste with a delicate hint of salt, then wrapped in a whisper-thin layer of dark chocolate and crowned with crunchy toffee grains and cocoa nib