Fill a shaker with ice cubes. Add gin, cream, simple syrup, egg white, lemon juice, lime juice and orange flower water. Shake and strain into a highball glass. Top up with soda water.
Henry C. Ramos invented the Ramos Gin Fizz in 1888 at his bar, the Imperial Cabinet Saloonin on Gravier Street, New Orleans, Louisiana. It was originally called the New Orleans Fizz, and is one of the city's most famous cocktails. Before Prohibition, the bar was known to have over 20 bartenders working at once, making nothing but the Ramos Gin Fizz - and still struggling to keep up with the demand. During the carnival of 1915, 32 staff were on at once, just to shake the drink. The drink's long mixing time (12 minutes) made it a very time consuming cocktail to produce.