Sour Pampered Mousse

Chill a martini glass beforehand to ensure optimal serving temperature.

Combine the Nikka Coffey gin, Giffard grapefruit liqueur, freshly squeezed lime juice, and Velvet Falernum in a cocktail shaker.

Fill the shaker with ice and shake vigorously until well-chilled.

Strain the mixture into the pre-chilled martini glass.

Garnish the cocktail with a twist of grapefruit peel, releasing its fragrant oils over the drink before placing it elegantly on top.