Improved Dunlop Cocktail

Select and pre-chill a cocktail coupe.

Prepare a garnish by creating a twist of grapefruit zest.

Stir the Tawny Port, agricole vieux rhum, sugar cane syrup, and mole bitters with ice until well-chilled.

Fine strain the mixture into the pre-chilled coupe glass.

Express the grapefruit zest twist over the cocktail, then use it as a garnish.