Method
- Fill a rocks glass with ice cubes.
- Add grenadine, orange juice, rhubarb liqueur, and vodka to a shaker.
- Fill the shaker with ice cubes and shake well.
- Strain the mixture into the rocks glass.
- Garnish with an orange zest.
About the Rocky
This sour cocktail uses vodka as a base and gets a herbal and citrus character from rhubarb liqueur and orange juice.