Egg white has long been used to add an airy texture to tart cocktails. Try shaking one up with some Cointreau, lime and raspberries for a delightfully frothy cocktail.
How to make
Combine all ingredients apart from soda water in a cocktail shaker
Add ice and shake until well-chilled
Strain into a chilled coupe or cocktail glass
Top off with soda water
Garnish with a raspberry