Campari with fresh grapefruit juice is a superb festive drink, it has a bittersweet flavour for grown-ups only. It’s just the season to set your Christmas swinging.
2 red grapefruits (or more depending on how many re-fills you want)
1 egg white
Cut the grapefruits in half and squeeze the juice from them. Set the skins aside. Strain the juice into a spare bottle or jar and refrigerate. Take two saucers. Whisk the egg white a little and put it into one saucer and the caster sugar in the other. Dip the rim of your cocktail glasses first into the egg and then the sugar. Put two ice cubes in each glass, cover with Campari and top up with grapefruit juice.