Cranberries are small berries that range in color from white to red, that grow on low-lying vines in marshes and bogs. Unlike most other berries, cranberries do not get sweeter as they ripen, and have a tart, sour flavor. Cranberries are crisp in texture and contain four small air pockets that make them buoyant and easy to harvest.
Can't Find Them? Look In The Frozen Aisle
You can use frozen cranberries instead of fresh. It'll be cheaper and you'll barely notice a difference.