You can use either fresh or frozen cranberries to make this dessert. The minute fresh cranberries start showing up in the grocery store; I buy multiple bags of the tart fruit. Then I store them in the freezer to have them on hand throughout the year. Fresh cranberries freeze well, and you can leave them right in the bag they came in for freezing.  According to Medical News Today, cranberries are classified as a superfood. They are native to North America and harvested in September and October.