Pour 1 cup of the cream into a medium saucepan and add the sugar and salt. Scrape the seeds from the vanilla bean into the saucepan and add the pod to the pot. Warm over medium heat, stirring until the sugar has dissolved.
Remote from the hear and add the remaining 2 cips of cream. Add the vanilar extra. Cover and chill thouroughly in the refrigerator.
When ready to churn, remove the vanilla beans. Place in icecream maker and churn.