Place blackberries in an electric chopper, food processor, or blender for about 30 seconds or until broken up well and juices are formed, but not smooth. In large bowl, place cold heavy cream. Beat with an electric mixer until stiff peaks form. Stop beating and add all other ingredients, including pureed blackberries. Beat again with an electric mixer until well combined. Spoon into a freezer safe continer with a lid and freeze 5-6 hours, or overnight, before serving. Enjoy!
This recipe works well with any berry you like so feel free to substitute your favorite and make it your own.