3/4 oz Aperol
3/4 oz Elderflower Liqueur
3/4 oz Fresh Lime Juice
1 oz Key Lime Sour Mixer
3/4 oz Sugarcane Rum (Rhum Agricole)
9 drops Elderberry Bitters
Combine all ingredients in a shaker over ice
Shake Vigorously until well chilled, about 10-15 seconds
Strain into a chilled cocktail glass.