Karl the Frog

Dry shake the egg white, genever, herbal liqueur, freshly squeezed lime juice, simple syrup, and half-and-half vigorously without adding soda water.

Add soda water and shake the mixture again with ice to chill and properly combine the ingredients.

Double strain the cocktail into a chilled cocktail coupe to ensure a smooth texture.

Serve immediately and enjoy the frothy, aromatic blend.