1largemilk kefir grain(or about 1 Tbsp. water or milk kefir grains)
Add your kefir grains to your apple juice in a glass container.
Let it sit for a day or two (or three). It’s a good idea to taste it every day or so to see how it is developing. Your cider will get less and less sweet as the sugar is being consumed by the kefir grains. The time it takes will depend upon the temperature of your house, the amount of juice used, and the amount of kefir grains being used.
As it ferments, you will notice that bubbles start to form, so it's a good idea, if you are letting it sit in an airtight container, to leave a little space at the top, and to check on it and let some air out each day. If you wait too long, the cider will start to taste too yeast-y and gets an unpleasant taste. That’s why it’s a good idea to try it each day and stop when you get to a point that you like.
When it has fermented to your liking, take the grains out, bottle up the cider, and put it in the fridge. The carbonation will continue to build up a bit more with time.
Now, all that’s left to do is to drink it and its probiotic goodness. Enjoy!
Recipe printed from Oh, The Things We'll Make! Blog. https://thethingswellmake.com/kefir-hard-cider/