I love this stuff. It is so expensive in the stores though. I cannot get the bubbly yeasty taste of the store bought stuff at home. I have been trying to hunt down some grains with no luck. I think I have found a good solution.
Kefir is a wondrous drink. It is filled with tons of pro and prebiotics, way more than yogurt. It is very healing and good for your body. It is made in the same manner as yogurt; you heat the milk, cool, add the starter and let it culture about 24 hours. Since I don't have the grains, it finally occurred to me I could just make kefir the same way I make yogurt.
I bought some Yogourmet kefir starter, but at $4.50-ish for a box of 6 starters, not so cheap since you need a liter of milk for each batch. I always have trouble with the starter. Twice it did not come out at all, even though I used a candy thermometer to make sure the milk was at the precisely correct temperature for each stage. The most recent batch I tried came out...ok. It was almost cottage cheese-y in texture. When I was getting low, I decided to use it to culture a fresh batch instead of using starter again.
I brought a liter of milk to almost the boiling point and let it cool until it was warm. I added a quarter cup of kefir and mixed well. I poured it into a mason jar, covered and by morning, I had a beautifully cultured bottle of kefir. It was almost solid after 12 hours where usually 24 hours barely gets it going. It worked really well! I wish I would of tried that before messing with starters. I may of gotten better kefir with the store bought kind. I'm hoping I can keep making it like this as it will save money and I get a better product.
(note, the picture above is not mine. I just wanted a picture to display what it looks like)