How To make Sauerkraut In A Mason Jar, is a perfect addition to preparing fermented food in the kitchen. You don't need to have a crock and do not have to make huge, time consuming, batches of sauerkraut that are hard to store. Also you can make fresh sauerkraut with all the enzymes present, unlike canned sauerkraut which has been heated. Once made sauerkraut stores well in the refrigerator, and the mason jars take up very little space.