Fizz (generic name)
SHAKE first 4 ingredients with ice and strain back into shaker. DRY SHAKE (without ice) and strain into chilled glass (no ice in glass). TOP with soda (ideally dispensed from a siphon).
[['6 cl', 'Brandy, whisk(e)y, gin, rum etc.'], ['3 cl', 'Freshly squeezed lemon or lime juice'], ['1.5 cl', 'Sugar syrup (65.0°brix, 2 sugar to 1 water rich syrup)'], ['1.5 cl', 'Pasteurised egg white (optional)'], ['Top up with', 'Soda from siphon']]
[['6 cl', 'gin'], ['3 cl', 'freshly squeezed lemon or lime juice'], ['1.5 cl', 'sugar syrup'], ['1.5 cl', 'egg white'], ['Top up with', 'soda from siphon']]