I make frozen kefir, just like frozen yogurt. I'm not sure if anything survives or not, but it sure does taste good. I make it just like frozen yogurt, without the ice cream machine. I use plain kefir, add some sugar or honey, and some vanilla extract. Then freeze. Every hour take it out and stir to break up ice crystals. Continue this until it's almost solid. Then eat! Delicious! I've developed the habit of making smoothies out of the frozen kefir. Some of my creations are not so healthy though, including my fruity pebbles kefir smoothie. But I figure it's much better than store bought ice cream!