SHAKE first five ingredients with ice and strain into ice-filled glass. TOP with soda.
This cocktail is named after the founder of Ghirardelli Chocolate Company, Domingo Ghirardelli, an Italian-born man who moved to Peru and ran a successful confectioners business and, following the gold rush, ultimately ended up in San Francisco. He went on to found Ghirardely & Girard (later changed to the Ghirardelli Chocolate Company), which has been in continuous operation since 1852. In his own way, Ghirardelli helped build and shape San Francisco, and his company has become synonymous with the city. Ghirardelli Square, which his company-built, has been an official City landmark since 1965.
Adapted from a drink which was the signature cocktail of San Fanscisco Cocktail Week 21-27 September 2010.