: Have you ever try making your own cultured buttermilk? Once I had read about how it was done, I knew I just had to give it a shot. I use a lot of buttermilk in my cooking and baking and one of the things I like about it is the long shelf life it has for a dairy item. The way I did mine was to use some buttermilk that I had purchased at the store. I believe I read that there are powdered culture that can be used but it was easier for me this way. STEP 1. Need to start with a clean and sterilized jar. I used a quart size. STEP 2. Start with fresh milk and cultured buttermilk. The fresher the better. If your buttermilk is older than 3 weeks it might not have enough active bacteria to give the results needed. I used 1% milk but that is because I wanted just a little fat in my milk. Gives it a little richer flavor but you can use skim if you want. STEP 3. Add a bacterial starter of 6 to 8 ounces of active fresh cultured buttermilk to a clean quar