- 4 fluid ounces rum
- 3 fluid ounces lime juice
- 1 fluid ounce grenadine syrup
- 1 fluid ounce simple syrup
- Pour the rum, lime juice, grenadine, and simple syrup into a cocktail shaker over ice. Cover, and shake until the outside of the shaker has frosted. Strain into clean test tubes or shot glasses to serve.