Step 1.
- Fill a cocktail shaker with ice.
Step 2.
- Add 1.5 ounces of gin to the shaker.
Step 3.
- Pour in 1 ounce of elderflower liqueur.
Step 4.
- Add 1 ounce of fresh plum juice.
Step 5.
- Shake well until chilled.
Step 6.
- Strain the mixture into a champagne flute.
Step 7.
- Top with 3 ounces of sparkling wine or soda water.
Step 8.
- Garnish with a slice of plum and an edible flower.