5 issues of BBC Good Food for £5
Put all the ingredients except the ice into a cocktail shaker or a large jam jar with a good seal. Shake well to combine.
Add a handful of ice to the shaker and shake vigorously for at least 30 seconds or until the sides of the shaker feel cold. Strain into tumblers with more ice, or into coupe glasses, without ice. Serve with a grapefruit twist garnish.