Pour all ingredients into the ice-filled glass and briefly stir: Raspberry purée 25 ml · Blackberry purée 25 ml · Soda water 100 ml · Lemon juice 20 ml · Vanilla syrup 20 ml
Garnish with a seasonal berry
Tips
Stir only briefly after adding the soda water — enough to lift the purées off the bottom, not so much that the soda goes flat.