Fernet con coca, also known as fernando, its diminutive fernandito, or several other nicknames, is a long drink of Argentine origin consisting of the Italian amaro liqueur fernet and cola, served over ice. The success of the Fernandito cocktail started in the early 20th century when Fernet was first brought into the country by Italian immigrants. From then on, consumption of Fernet grew drastically.
Fill a chilled Highball glass with plenty of ice and pour in the Fernet Branca.
Top up with coke and gently stir the drink before serving.