White Negroni Sour

Select and pre-chill an Old Fashioned glass.

Prepare a garnish by twisting a strip of lemon zest.

Shake the gin, blanc quinquina, gentian liqueur, freshly squeezed lemon juice, rich sugar syrup, and egg white or cocktail foamer with ice.

Strain the mixture into the prepared glass filled with fresh ice.

Express the lemon zest twist over the cocktail to release its oils, then use it as a garnish.