The Gin Fizz is the grandaddy of all fizz cocktails. We don’t know who first had the idea of shaking around an egg white with a bunch of gin and sugar, but we salute them!
Like all egg (or aquafaba) drinks, you should double-strain before serving – once through your cocktail strainer, and then through a fine wire-mesh strainer into the serving glass.
Don’t serve the Gin Fizz over ice; it’s meant to be served very cold and drunk very quickly, without any extra dilution.