Great question — answering as the UphillTech team:
According to the Cranberry Institute: Yes. In fact cranberries freeze very well either whole or sliced. Sealed in an airtight container frozen cranberries will keep for nearly a year. Personal experience bears this out as well, with unsweetened cranberry dressing (fresh cranberries and orange zest, zapped in a food processor. Thaw, add sugar to one batch for those who like it traditional, and splenda to the other for dieters and diabetics.)
Full answer by RI Swamp Yankee: https://cooking.stackexchange.com/a/38152 (CC BY-SA 3.0).
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