IBA official recipe includes:
Components
45 ml – Tequila
90 ml – Orange juice fresh
15 ml – Grenadine syrup
Preparation
Pour tequila and orange juice directly into highball glass filled with ice cubes. Add the grenadine syrup to create chromatic effect (sunrise), do not stir.
* Notes – Standard garnish is half orange slice or orange zest twist.
Enjoy ! ADB
The cocktail is named for its appearance when served with graduations of colour resembling a sunrise.