Hancock

Place the basil leaves in a shaker and gently muddle them to release their aromatic oils.

Add the gin, lime juice, herbal liqueur, and simple syrup to the shaker.

Fill the shaker with ice and shake vigorously to chill the mixture.

Double strain the cocktail into a chilled cocktail coupe to remove any solid particles.

Garnish with a sprig of rosemary, allowing its fragrance to complement the herbal notes of the drink.