Add the rosemary sprigs, elderflower cordial and lemon juice to a small saucepan. Cover and bring to a gentle simmer over a low-medium heat. Simmer for 2 minutes then remove from the heat and allow to cool and infuse.
Once cool, remove and discard the rosemary sprigs and pour the elderflower cordial into a Creami tub. Top with 300ml (10¼fl oz/1¼ cups + 1 tsp) w