Care and Feeding of Your Kefir Grains

This is a letter I wrote to a friend when I gave her kefir grains last week. I hope it is useful to you, as well!

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Congratulations! You are now the steward of an amazing life form, kefir, that will provide you with cultured milk very little work on your part. You are the next a long and unbroken line of stewards that stretches back into the mists of time. Interestingly, no one really knows where kefir comes from or how it first came about. It is believed that the first kefir drinkers came from the mountains of the Caucasus where it is considered a gift from the gods. They may be right because no one has been able to grow kefir in a lab without a starter. Every kefir grain in the world is descended from those original grains.

Kefir grains, as they are called, are not really grains or seeds at all. The spongy “grains” are a colony of yeast and bacteria that convert the sugar in dairy milk into their own spongy outer covering, energy to live and reproduce and a whole host of acids, vitamins and alcoholic byproducts of their metabolism. The grains will grow and reproduce in any dairy milk and like to stay at room temperature so no heating is required. You can also use the grains to ferment other sweet liquids but the grains won’t reproduce. For more information on the microbiological make up of kefir grains, or for any other kind of information you could want about kefir, be sure to check out Dom’s Kefir In-Site.



Care and Feeding of Your Kefir Grains

The Very Basics

2 tbs of kefir grains
2 cups of milk

Place the kefir grains and milk in a glass jar with a lid and leave at room temperature until the milk thickens and sours. Strain the kefir, reserving the grains. Add the grains to fresh milk and store the finished kefir in the fridge until you use it.

See, wasn’t that easy?

Beyond the Basics

They also like to stay at a comfortable room temperature, somewhere between 50 and 70 degrees Fahrenheit. That being said, they are resilient buggers and can bounce back from a lot of abuse.

The Milk

Kefir grains are at their happiest in dairy milk that is as close to the way it came out of the animal as possible. They love raw milk but do just fine in pasteurized milk. They do fine in cow or goat milk (or any other type of dairy milk you happen to have) and prefer whole, full fat milk. Low fat milk would be fine, but do not keep them in ultra pasteurized milk (which is actually shelf stable, they just sell it refrigerated because Americans won’t buy shelf stable milk), or non-fat milk for extended periods. If you must buy these types of milk treat them as non-dairy milks, discussed below.

Oh – someday you should try popping your kefir grains into whipping cream. You will never look at sour cream the same way again. Yum!

The Grains and Separating Them

It is suggested to use 1-2 tablespoons of kefir grains to 2 cups of milk and let it ferment at room temperature for 24 hours. You will learn to adjust the amount of milk based on how your kefir grains are doing at culturing milk, the ambient temperature and how many grains you have available. Remember, these guys are hardy and will culture your milk as best they can in a wide variety of circumstances.

You don’t need to rinse your kefir grains (except in special cases as talked about below), just transfer them. They should be clearish white, quite puffy and complex and soft to the touch with a slimy coating. If they are hard, or yellow or smooth they are unhappy and you should check with Dom’s Kefir In-Site to see how to help them, or if they are beyond help.

To separate the grains from the finished kefir you can either strain the kefir through a wire mesh (or plastic, or bamboo) strainer, or fish them out with a spoon or fork. For a long time I fished mine out with a small wooden fork and liked the ease of this method. Any grains I didn’t ‘catch’ just stayed in the kefir and got blended when I made smoothies. I now tend to strain and like that method for two reasons. One, it catches all the tiny baby kefir grains that start to grow in the kefir and two, it helps break up and smooth out the curd of the finished kefir.

Utensils and Jars

I culture my kefir in glass jars with a screw top lid. I tend to ferment mine with the lid on tight because I am afraid of knocking it over and spilling it, but many people suggest leaving the lid slightly ajar, or using a towel or coffee filter over the top of the jar instead of a solid lid. A tight lid allows the kefir to get more fizzy and may alter the amount of alcohol in the finished kefir. Check Dom’s Kefir In-Site for more information about various ways to effect the final fermentation.

It is fine to use stainless steel strainers or utensils to handle kefir, but please make sure they are clean and not left in the kefir for an extended amount of time. Do not use any reactive metals like brass, aluminum, cast iron, or copper. Kefir is acidic and these metals are bad news with acidic food. Plastic or bamboo are other fine choices for handling kefir.

How do I know it’s Ready?

You will know the kefir is ready to strain because the milk will have thickened and smell sour rather than sweet. At first it will be like the consistency of buttermilk, store bought kefir or drinkable yogurt but eventually the kefir will curdle and separate. When this happens you will see a thick layer of white curds floating on top and a thin yellowish liquid below. Taste your kefir at various stages to see which you like to drink – most people prefer it when it has just thickened but I don’t mind curdled kefir, myself.

If the kefir has curdled I make sure the lid is on tight and shake the jar to break up the curds. Then I separate the grains through a strainer and the finished kefir is perfectly good for baking or sweetened smoothies. Remember, kefir is a mix of bacteria and yeast so it will always have a bit more of a yeasty flavor than yogurt or even store bought kefir (which by law is not allowed to have yeast in it). Experiment with more milk or less time if your kefir is too “ripe” or sour for your tastes.

Photo by David Niergarth.

Resting Your Kefir Grains

Your kefir grains will keep fermenting milk into kefir indefinitely as long as they have good milk and proper temperatures. But sometimes you need a break either because you have too much kefir or you won’t be able to strain the grains every day. Luckily, you can refrigerate the kefir grains for up to a couple months with no detriment to the grains.

When you are ready to give your grains a break put them in a clean jar with the same amount of fresh milk that they have been fermenting in a 24 hour period. Dom recommends this amount of milk for resting your grains for up to a week. He suggests increasing the milk by about 30% for each additional week of storage, or you can simply strain the kefir out each week. I have kept 3 tbs of kefir grains in a cup of milk for a couple months at a time and the grains have bounced back just fine. The kefir you strain off the grains after their rest in the fridge is perfectly safe to drink, though it may be thinner or more sour than usual.

Do note that different strains of bacteria and yeast respond to cold storage differently so kefir grains usually require a little care when coming back to full fermenting strength. They should also get to come out of the fridge and ferment at room temperature for a week or so every couple weeks or months so they don’t get too out of balance.

When bringing kefir grains out of the fridge strain them off the old kefir and put fresh milk over them like normal. I usually use a smaller proportion of milk than usual, and change the milk as soon as it seems sour, even if it is a slightly different consistency than usual. The kefir should come back to what you expect it to be within one or two cycles with fresh milk.

Culturing Non-Dairy Beverages

Kefir grains need dairy milk to grow and reproduce but they will culture any liquid into a probiotic beverage. There are two ways to culture non-dairy beverages – switching the grains back and forth, or sacrificing some of the grains to the non dairy beverage.

If you are going to make non dairy kefir only occasionally it is best to switch the grains back and forth. I occasionally make coconut milk kefir by plunking the strained grains into canned coconut milk and let that ferment for 12 or 24 hours. When the coconut kefir is ready strain out the grains and put them back in dairy milk. I often rinse my grains before putting them back in the dairy milk thinking that the surface of the grains needs to be in good contact with the dairy milk. Dom cautions against rinsing in most situations, and I am careful when rinsing to not contaminate the grains.

If you want to continuously ferment non-dairy kefir you should hold back a portion of the grains in dairy milk and use another portion for the non-dairy milk. Use the grains in soy, almond or coconut milk the way you would in dairy milk just being sure to note when they are no longer healthy looking or fermenting properly. Keep another portion in dairy milk so that it keeps growing and you have some to replenish your non-dairy grains when they no longer ferment properly. I’ve never done this method myself, but have heard of others doing it with great success.

You can also play around with fermenting juice or sugar water as well. It often goes alcoholic, but sometimes turns out very tasty.

What To Do With All Your Kefir

Kefir is great in smoothies and baked goods and in a million other dishes. It can basically be used anywhere you would use buttermilk, but it does have a bit of a yeasty flavor that can be unwelcome in some dishes. In other dishes you’d never know the milk was cultured. Here are my favorite ways to use kefir.

*Smoothies. Combine the kefir with frozen or fresh fruit, juice, ice, and sweetner of your choice in a blender to make a delicious smoothie. Add coconut oil, nut butter or good quality egg yolks to boost the protein and fat content, or use more juice to make it lighter. You can blend the kefir with a little fruit syrup or pulp to make it more like the flavored kefir at the store. Experiment with green smoothies!

*Blender Batter Pancakes. This is a method for making pancake or waffle batter by soaking whole grains in kefir overnight and then grinding in your blender. Here is Sue Gregg's original recipe, and here is my blog post on the recipe.

*Kefir naan or flatbread. This is a neat recipe where you combine kefir and wheat flour, knead it like regular bread dough, then let it raise overnight. The natural yeast in the kefir is all the leavening you need. It is a very sour dough but tender and delicious. Cook like naan or pita on a griddle, use as a pizza crust or bake as rolls. Here's the link to the website, and here's a photo and write up of the time I did it.

*Macaroni and cheese. Just use kefir instead of milk for boxed or real cheese sauce.

*Clafouti. This is a delicious, rustic French dessert (or decadent breakfast) that is essentially an eggy pudding studded with fruit. Here's the recipe I use. I just substitute kefir for the milk and use whatever fresh or frozen fruit you have.

This post is a part of Real Food Wednesdays. Check out more real food blogs at the carnival!

Kimchi

I just broke into my latest fermentation experiment, a fantastic kimchi with lots of goodies, including arame seaweed. Kimchi is a fermented cabbage condiment that originates in Korea but is similar to sauerkraut. The main difference is seasoning - kimchi most traditionally is seasoned with ground red pepper, onion, garlic and ginger in addition to the salt. It can include any number of additions or substitutions including cucumber, carrots, different types of onions, root vegetables like radishes, fruits like apples or raisins or even stranger things like shrimp paste or raw shellfish. Koreans have hundreds of variations and these photos by eryoni taken in South Korea show just some of the diversity of Korean pickled vegetables.

This batch I made included the exotic addition of arame, a type of seaweed. Seaweed is a great thing to add to anyone's diet for the trace minerals and rare proteins and sugars. Arame, the common name for the kelp Eisenia bicyclis, is a rich source of calcium, zinc and iodine. It is also a good source of lignans which help fight cancer according to some studies. As expected, its taste is hardly noticeable in the highly flavored kimchi, though it is visually apparent as black threads in the cabbage mix.

Kimchi with Arame

Green/white cabbage
Carrots
Green Onions, or sliced white onions
Arame
Ginger
Garlic
Ground chiles
Sea Salt

Note on amounts: I don't give any. That's not the important part. To make one quart of kimchi I filled up a 3 or 4 quart mixing bowl with shredded veggies and seasonings. I would expect this is about 3/4 of a medium head of cabbage, 2 good sized carrots, 10 big green onions, a handful of arame, 3 inches of ginger, 5 cloves of garlic and enough chiles to make it red and spicy. Enough salt to make it "too salty to be tasty, not salty enough to be gross". See my blog posts on making sauerkraut, making pickles and my pickle FAQ for more information on my methods.

I used a mix of ground whole dried peppers and commercial New Mexico chile powder. In the past I have used a mix of chile flakes (like for pizza), cayenne, New Mexico Chile powder and paprika. You should use however much of whatever you have. This is artisanal cooking!

Shred the cabbage to your liking and either chop, plank or ribbon the carrots with a vegetable peeler. Chop up the green onions however you see fit and mince the ginger and garlic into matchsticks or tiny specks, as you see fit.

Put the handful of dried arame into a bowl of warm water and let sit for 5 or 10 minutes.

Toss all of the veggies together with the ground chiles and salt in a large mixing bowl or cooking pot, tasting as you mix. Pull the arame out of the water, squeezing it as dry as you can and leaving all the grit behind in the bowl. Mix that into the veggies and continue mixing, tasting and adding salt or chile powder as necessary.When the veggies and seasonings are mixed together well and good and salty you can either leave it in the bowl for an hour or so, or start packing it right away. I have gotten lazy and been leaving it in the bowl for a while to allow more liquid to come out of the veggies and make packing it easier.

When you are ready start spooning the mixture into your clean quart sized jar. Really pack it down in there. I use a regular mouth half pint jar to push it down into a wide mouth quart jar, but I've also used wooden meat mallets and those Chinese soup spoons to pack the veggies down. You really want to squeeze all the air out of the jar and let the liquid come up over the veggies. If you are squeezing and squeezing and still not getting liquid over, or at least to the top of your veggies you can add some more brine - salt added to water until it is too salty to be tasty but not so salty it makes you gag. You will end up with a wetter kimchi, but it will ferment just the same.

Put the lid on your well packed veggies and leave them on the counter for a couple days. I find that ferments with ginger in them seem to get fermenting much more quickly. I did this kimchi a day after doing a plain cabbage kraut but the kimchi was ready to go in the fridge a day earlier. It was fizzy and the lid was popping and it was smelling quite sour. Put it in the fridge and start eating it whenever you want something spicy gingery sour salty.

I have been eating this kimchi with everything. My favorite is kimchi and macaroni and cheese, but I was also really impressed with kimchi and colcannon - mashed potatoes with sauteed cabbage and collard greens. It's of course great with any stir fried vegetables or Asian flavored meats, and I tossed a fair amount into a bowl of instant rice noodle soup the other night. I think the trick to incorporating fermented vegetables into your diet is just putting a spoonful on your plate with every meal. No matter what the food you are eating is, try it with some sauerkraut, pickles or kimchi. Maybe you won't like it and you don't eat that spoonful. Then again, maybe you will love it and have discovered a whole new taste sensation. And isn't that what life is all about?

Oh - while you are thinking about kimchi you should check out the Ultimate Kimchi Recipe. The listed ingredients may or may not be the actual ultimate kimchi but the directions certainly do. Enjoy.

This post is a part of Real Food Wednesday, check out everyone else's real food posts!

Of Probiotics and Pickles

If you are in anyway connected to the world you've probably heard more and more about probiotics and beneficial bacteria. People are selling probiotics as pills, liquids, juices, yogurts and other fanciful items. Most of you have probably seen the yogurt commercial with the slightly disturbing animation of an arrow on a woman's stomach and you might even be able to hum the jingle for that product. What's all the big deal about probiotics anyway? And do we really need to spend top dollar to have them added to our foods?

The term probiotics refers to bacteria and yeast found in food that are good for your body. Our skin and intestinal tract are completely covered in bacteria and the idea is that inviting the right kind of bacteria into that system has health benefits. The human gut can contain over 2 lbs of intestinal microflora (beneficial bacteria) and they do some pretty important work there. They help digest food and create vitamins, they make it hard for bad bacteria to live there and stimulate the part of our immune system that is in our digestive system. In fact, there is more and more evidence that everything from acute intestinal upset to allergies to autism can be helped by normalizing gut bacteria and using probiotics. There are lots of good commercial probiotic foods and supplements available (as well as some not so good ones) but being the DIY kinda girl I am, I like to make my own.

Yogurt, kefir and buttermilk are all very common probiotic foods. These are all fermented dairy products that are eaten while the bacteria are still alive. Vegetables and fruit can also be cultured into probiotic foods through a process called lacto fermentation. A couple months ago I wrote a tutorial for making sauerkraut, one of my favorite kinds of lacto fermented vegetable. Sauerkraut is a great way to start in on fermented vegetables because most Americans at least know what sauerkraut is and many even already like it. I've been surprised at how many of my friends are excited to try my sauerkraut because they grew up eating sauerkraut. Sauerkraut is not the only pickled vegetable out there so don't despair if you don't like the kraut.

Vegetable pickles are possibly even easier than sauerkraut and allow for as many variations as your imagination can come up with. The basic idea is to cover vegetables with a salty brine and allow the bacteria to do their thing. I'll give you a recipe-tutorial for my very favorite pickled vegetable recipe and list some of my favorite variations here and then I'll answer some common questions in a follow up post.

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Spicy Carrot Pickles

I like Spicy Carrot Pickles so much because they come out great every time. They are salty, spicy and a bit sour and always have a great texture. You can adjust the amount of spiciness to your liking using different kinds of peppers. These are based on the pickled carrots usually served at autentico taco places so they should be sort of familiar to a number of people.

Step One: Jar and Vegetable Prep

Find a glass jar with a tight fitting lid. A pint sized mason jars with a metal or plastic lid is great but an old pickle jar work just as well. Wash the jar and lid with hot soapy water and rinse well.

For a pint (two cup) jar you will probably use 1 1/2 - 2 medium carrots, 1/2 an onion, 2 cloves of garlic and half of a jalapeno. Have more carrots available in case I am underestimating and adjust the garlic and pepper as your family would like. I find half a jalapeno adds heat but is not blinding, but you may have widely different tastes. You can use a hotter pepper like Serrano or Habanero (if you dare) or a milder pepper like an Anaheim, a Hungarian pepper or a pizza pepper. Be sure to adjust the "half a pepper" accordingly to the size and heat of the pepper you choose. You could also use a pinch of red pepper flakes instead of fresh peppers.

Wash the carrots but don't peel them. Slice them into long ovals by slicing on a steep diagonal to about 1/4 inch thickness. Peel and slice the garlic cloves and slice the onion longitudinally (from pole to pole, not around the equator) into 1/2 inch slices or into chunks. Slice the jalapeno into rings. Layer the vegetables in the jar to within an inch of the threads.

Step Two: The Brine

There are all kinds of recipes out there for brine strength ranging from a specific measurement in the jar to percent salinity. After reading The Ultimate Kimchi recipe and Wild Fermentation by Sandor Katz, I decided to do this the old fashioned way - use my taste buds.

I make a brine by adding salt to water until it is "too salty to be tasty, but not salty enough to make me gag." I understand that this is a very vague description of how much salt to use, but it works. I promise. Start with a teaspoon in a pint (two cups) of water and taste it. You can hardly taste the salt, right? Add another teaspoon and taste again. Then increase by half teaspoons until the water is really gross. Add a splash of water and taste again. Somewhere in between tasty and gross is the right amount of salt. It always seems a little saltier than seawater to me.

Oh - and use the right kind of salt. You should use sea salt because it is pure and has lots of trace minerals that are really good for you. I personally use RealSalt because it lists the trace minerals on the package and sells for a reasonable price. Other sea salts would be fine too. You can also use kosher salt or other salt as long as it has no iodine and no anti-caking ingredients. One caution about Celtic or grey salt - moist salt is sometimes known for carrying bacteria and mold that can ruin your ferments. If you want to use moist Celtic sea salt then you should bake it first until it is dry. Seriously, though, who needs to go through that much work for pickles. Just buy some lower quality sea salt for fermenting and keep the Celtic for sprinkling on your potatoes.

Once you have your brine made with the right kind of salt to the right saltiness then pour it over the jar full of vegetables. The brine should cover the vegetables but still be below the threads of the jar. Screw the lid on tight and set it on the counter to begin fermenting.

Step Three: Fermentation

Just like in the Kraut 101 tutorial I recommend you check your pickles every day and learn to look for signs of fermentation. The day after you make your carrot pickles open the jar and listen for popping, fizzing or hissing as you open the jar. Smell the contents and then taste a sip of the brine (you can take some out with a spoon or just sip it out of the jar like I do... but then again I'm pretty cavalier about things like that). Is it at all sour or fizzy or still just salty? Put the lid back on and let it sit out for another day.

It usually takes 2-5 days for signs of fermentation to really show up. Exactly how long depends on everything from the quality of your vegetables and the ambient temperature to whether you sacrificed to the proper deities. I'll address some of these variables in the next post and in the end it doesn't really matter how long it takes, just that it happens. Be patient, it will.

When your pickles are popping, fizzing or starting to taste sour then move them to the fridge. Carrot pickles usually taste best after another two or three days in the fridge (you should try them every day to see when you like them best) but will last for months without getting mushy or gross. The onion will start to get a little mushy after a month or so but whole garlic cloves are still virtually raw until at least a month in the brine.

I like to eat these pickles in anything even remotely Mexican in flavor. I love them in quesadillas and burritos as well as on salads. The pickle brine can really brighten up a soup and makes a fine salad dressing when substituted for vinegar in any recipe.

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Once you've run through this recipe once then you are ready to start thinking about pickling other vegetables. Here are some of my favorites.

Cucumbers: pickled cucumbers are a classic. I have used whole pickling cucumbers as well as sliced eating cucumbers (remove part of the skin, it is tough and bitter). Pack the jar with cucumbers, dill seed, garlic cloves, black peppercorns and maybe some sliced onion and/or mustard seed. Cover with brine and follow the steps above.

I didn't use cucumbers as my master recipe because I've had mixed luck with fermenting them. Cucumbers, being so watery, are at risk of getting mushy and even when they aren't mushy they never taste quite the same as vinegar pickles do. I like the fermented flavor but have not yet perfected the crunchy cucumber pickle. Some people add a grape leaf to the jar and others soak the cucumbers in salty water first. I'm going to experiment this summer and I'll let you know.

Turnips, Radishes, Not Spicy Carrots: Slice them into planks or chunks and cover with brine. Try these will dill seed and garlic or with mustard seed and red pepper flakes. Turnips tend to be a bit spicy when fermented, but are great on salads.

Beets: I recently made up a jar of sliced raw beets and carrots with no extra seasoning at all. The liquid is thick, sweet and deep red and the vegetables are now tender, sour, sweet. Fantastic.

Green Beans or Asparagus: Trim the veggies to fit in the jar and add a garlic clove and maybe one of those small, dried red chiles. Try doing the same with okra. A little juice from one of these jars is the secret to my Bloody Mary. Fantastic!

Mushrooms: White or baby 'bella mushrooms can be pickled in brine into a very tasty appetizer. I like to add black peppercorns and mustard seed as well as a small garlic clove. The mushrooms will float like corks but it has never seemed to be a problem.

Summer Relish: Last summer I made a jar of relish using canned corn, chopped green tomato, red bell pepper and onion with mustard seeds. It took a month or so for the flavor to develop but I was sad when it was gone. It was long past green tomato season and I've been daydreaming about it ever since!

Pickled Garlic: Peel the cloves, fill the jar and cover with brine. It will take months (as in 4 or 5) for the cloves to ferment fully but it will be worth it. They ferment into this mellow, garlicky, almost sweet tangy condiment. Perfect for salad dressings and topping soup. And exceptionally good for you!

Of course you can mix and match. I almost never make a jar of just one vegetable, I use whatever I have around. I will often add turnips or carrots to sauerkraut, or get lazy and throw brine over cabbage as well. Give any vegetable you have a try in the brine and see how it turns out. Experiment with seasonings, garlic, onion and different flavor combinations. You'll be amazed at what you find you like. I serve pickled vegetables with almost every meal and pretty soon you will be too!

This post is part of the Real Food Wednesday Blog Carnival. Be sure to check out the other posts for more great real food ideas!

To see more photos of my lunches, others with home made pickles in them, check out my Flickr page.