Combine all the ingredients in a medium saucepan. Bring to a boil over medium-high heat. Continue to boil approximately 7 minutes. Remove pan from heat and allow to cool slight.
If using a food mill, run mixture through the mill twice – first using the medium grade blade, then again using the fine grade blade. If not using a food mill, mash cooked berries with a potato masher, then run first through a large colander and then again through a fine mesh colander.
Pour extracted juice into a serving dish or mold. Refrigerate overnight to set.