Friday, April 30, 2010

Cultures, Generations, and Rhubarb

Since I got the buttermilk and yogurt cultures from Cultures for Health early last week, I've been a bit preoccupied in my new science experiments. Cultured buttermilk is where I began, after reading on the website that having different cultures too close together could result in cross-contamination. Since my house has been on the cool side, I thought I'd play it extra safe and do one at a time, held in the oven with the oven light on. As I mentioned the other day, this creates a mildly warm culturing environment, perfect for buttermilk making.

The cultures I received were large enough to start two portions. You begin with a small amount, and then build it into a larger amount - which I have determined to be a good thing since the future generations improve vastly. My first buttermilk was on the thin side and very "curdled" looking (I suspect in part due to the non-homogenized milk I've been using), but now that I have the 4th generation, it is thickened nicely and has nudged it's way into the List of Things I'll Never Buy Again.

The only somewhat bothersome thing is that to continue culturing, it is recommended that you use a portion of the existing batch to make a new batch at least once every 7 days. It could seem like a bother, but really, it is as simple as mixing 1 part buttermilk with 3 parts milk and then letting it sit. I'd bet even the busiest person with a hankering for homemade buttermilk could manage this! You let it sit undisturbed except for a peek here and there for 24-48 hours, so in scheme of homemade things, it doesn't get much easier than this. To make a silky smooth version, I used my little milk frother to approximate a bit of homogenization, and then the finished buttermilk was exactly perfect in every way.

After I had a nice 2nd or 3rd generation, I used a bit of it to make sour cream - a good way to use up the leftover heavy cream that I bought for the Schaum Torte Ice Cream. The first attempt at this turned out more like a Mexican crema, but after traipsing around the internet, I heated the cream to 80 degrees for my second attempt, and it was so thick I could turn the jar upside down! Ah, the wonders of culturing! I wish I could remember where I saw that tip, so I could give credit, but alas, my brain is full of microorganisms and I just can't recall. To make sour cream, use 3 tablespoons of buttermilk and 2 cups of heavy cream (half and half will yield a lighter sour cream), mix well and let sit at room temp (70 degrees) for 24 hours. If you have thickening issues, try heating the cream gently to 80 degrees, and then continue.

After the buttermilk was in full swing, I started the yogurt. Per the Cultures for Health instructions, I let the initial cup sit only about 8 hours. It was tasty, but very thin. However, when I used it to start a quart of yogurt and let it incubate for a full 15 hours, it was considerably thicker. This Bulgarian starter also has a wonderful flavor, much less tangy than YoGourmet culture I was using. This culture too needs to be re-cultivated every week or so to keep it viable and healthy, and the Culture for Health people purport that these can be used for years! We'll see how it goes, but so far, I am a very satisfied customer.

Meanwhile, my Mom came down for a visit, bringing a bagful of rhubarb from the garden, and color coordinating vintage finds as an early Mother's Day gift for me. After we got her in the door, she washed and cut up all of the rhubarb: some for the freezer and some to go right into some rhubarb juice. I really wanted to make Mostly Foodstuff's Rhubarb liqueur, but after some discussion (and inspiration from so many of the last CanJam pictures of cordials and infusions from so many different sites lately), I opted to go for rhubarb juice. I canned 4 pints in a hot water bath for 15 minutes (hot-packed). I felt a bit on the wild side, since I didn't use a proper recipe. Since rhubarb is high acid, I used the amount a rhubarb seen above and enough water to come just about half way up. My Mom has canned rhubarb juice this way for quite a long time, though hers is much sweeter than the one I produced. She helped me strain it through some cheesecloth, and told me if I wanted absolutely clear juice not to press on the cheesecloth to get all of the juice out of the expired vegetable. I always go for delicious quantity over color clarity in things like this, so I squeezed until the remnants of rhubarb looked kind of like dry paper pulp. But just look at the amazing color!

I added a scant 1/2 cup of sugar for what turned out to be about a half gallon of juice, but it would be a matter of taste. I would also imagine you could freeze the juice instead of canning it, but I was happy enough to can just 4 little pints of something. I think this is the first time I've done such a small batch, and it got me considering joining the CanJam...

I had just enough leftover juice to have a small cup. I drank part of it hot, which reminded me of a cider, and then put it in the fridge to cool. Cold, the juice has a such a pleasant viscosity, and without too much sugar, it is truly a delicious aperitif. I think it could be used rather well as a cocktail base, too, so everyone can be happy!

The remaining 12 cups or so of rhubarb is now being patient in the freezer. There are so many good rhubarb recipes floating around right now it is certainly not going to be difficult to find inspiration for it's use. The only caveat being that I will need to eat it all myself, since I am the sole rhubarb lover here. Something tells me that won't be much of a problem...


  1. I always thought that making your own cultured dairy products would be much harder. I think that I may just dive in now, especially since you speak so highly of it!

  2. So excited about your cultures! It makes me giddy! I totally forgot that you can make sour cream with buttermilk cultures -- but that's awesome. I might just have to start a little baby culture farm of my own...

    Also love the idea of the rhubarb juice. Rhubarb is one of the finer things spring has to offer, IMHO -- and I always look forward to finding new and inspiring ways to use it!

  3. Milwaukee area foodie friends: you can have a bit of my culture if you'd like to turn your homes into science labs... just let me know and we can meet up!

  4. ooooh. I will definitely have to take you up on that. Maybe I can trade you kombucha for buttermilk :)

  5. Oh, I have been wanting to make yogurt for so long. There is a very thick, rich Indian yogurt called doi that is sooo good and you may have just inspired me to do it. Sounds tricky though. The rhubarb looks beautiful and wow, the colors of the jams are just lovely.

  6. This is a great post full of everything I'm loving right now!! The rhubarb juice looks stellar; it would also be good for a jelly base...or rhubarb syrup. You should totally join the can jam! And you're mom sounds cool, too!


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