In cocktail shaker, add brandy, Florida Grapefruit juice, simple syrup, bitters and egg white. Shake vigorously 15-20 seconds to create frothy texture.
Add ice cubes to shaker and shake 15 seconds to chill drink.
Strain into chilled coupe or rocks glass filled with fresh ice.
Pour light splash of sparkling water over top to enhance effervescence.
Garnish with grapefruit twist.