Step 1.
- Chill a champagne flute in the fridge or fill it with ice water to cool.
Step 2.
- In a shaker, combine 1.5 oz of white rum, 1 oz of fresh lime juice, and 0.5 oz of elderflower liqueur.
Step 3.
- Fill the shaker with ice and shake vigorously for about 15 seconds.
Step 4.
- Strain the mixture into the chilled champagne flute.
Step 5.
- Top with 2 oz of sparkling wine.
Step 6.
- Garnish with an elderflower sprig.