2 oz of Gin
1/4 oz of cream
1/2 tsp of powdered sugar (or sugar)
1 oz of Lemon Juice
1/4-3/4 oz of sugar syrup (or simple syrup)
1 dash of orange flower water
1 of egg
Shake all ingredients (except soda) well over ice cubes in a shaker. Strain into a collins glass filled with ice cubes, fill with soda, and serve.