How to Brew and Flavor Water Kefir “Soda Pop”

How to brew water kefir at home and make "water kefir soda" using a variety of fruit flavors. Brewing tips and answers to common questions.
Water kefir is a great way to kick the soda habit, and an easy way to get more probiotics into your diet. My kids like it better than kombucha, because it has a milder, less acidic flavor. (Compare water kefir and kombucha.) There's still a certain muskiness to it from the fermentation. You're not going to pass this off as regular soda, but it makes a nice, naturally carbonated option for those of us who avoid sugary drinks and artificial sweeteners. Once you purchase your grains, you should be able to continue culturing indefinitely. It's much cheaper than buying soda or carbonated water, and healthier, too.

Here's what my kefir grains look like…

How to brew water kefir at home and make "water kefir soda" using a variety of fruit flavors. Brewing tips and answers to common questions.

Plastic, glass or wooden utensils are recommended with working with water kefir grains. Metal is supposed to burn them. (Click here to order s set of small nylon strainers.)

Which Water to Use for Water Kefir

You can use filtered or unfiltered water, but you must avoid chlorine, nitrates and other toxic compounds. These are bad for both you and your kefir grains. I use our unfiltered well water, which is high in minerals. If you use filtered water, such as RO water, you should add back in some mineral drops. Alternatively, you can add a pinch of sea salt, a pinch of baking soda and a clean shell from a pastured egg. When I first started brewing, I always added the egg shell, but later I found out too much calcium will make your kefir grains slimy and your brew stinky.

Which Sweetener to Use for Water Kefir

When brewing your water kefir, it's better to use less refined sugar because the trace minerals feed the kefir grains.Don't use honey, because it is naturally antibacterial and may negatively affect your kefir grains. The flavor of rapadura sugar was too strong for our family (at least so far). My sons didn't care for palm sugar, either, although I thought it worked just fine. Lately I've been using Florida Crystals, which are less refined organic cane sugar.

How to Make Water Kefir


  • 1/4 cup sugar
  • 1 quart water
  • 1 tablespoon (or more) kefir grains


To make one quart of water kefir, dissolve 1/4 cup sugar in one cup of warm water. Mix in the rest of the water. Check to make sure the liquid isn't too hot, and then add the kefir grains. We'll typically mix the sugar and water in a pyrex cup, then pour the sugar water in a quart mason jar and fill the jar to near the top. Cover and let sit, out of direct sunlight, for 24-48 hours.

How to brew water kefir at home and make "water kefir soda" using a variety of fruit flavors. Brewing tips and answers to common questions.

When the ferment is finished, I strain the grains out and transfer them into the next batch, or into some sugar water in the fridge. I've tried holding a finished brew in the fridge, but to me the flavor becomes less pleasant as it sits with the grains in. It's best to culture it out every 24-24 hours to keep your grains happy and healthy.

After the grains have been strained out, you can flavor the finished brew. Some of our favorite water kefir flavors are listed below.

If you need water kefir grains or other home fermentation supplies for water kefir or kumbucha, I highly recommend Kombucha Kamp.

Order Fresh Live Kombucha and Water Kefir Cultures and Brewing Equipment

How To Flavor Water Kefir

Lemon Lime Water Kefir

For lemon-lime water kefir, I use the zest and juice from one lemon and one lime (preferably organic) for five to six cups of water kefir. I like to zest my citrus with my microplane grater. (Thanks to my friend, Julie, for this handy gift).

How to brew water kefir at home and make "water kefir soda" using a variety of fruit flavors. Brewing tips and answers to common questions.

I add the juice and zest, give it a mix, and cover and let it sit on the counter top for another day.

Shortcut Lemon Lime water kefir: While I love the depth of flavor I get from the fresh fruit, sometimes I just want something QUICK! So, I bought a bottle of organic lemon juice and organic lime juice, and use two tablespoons of each per quart of finished water kefir. Vitamin C is light sensitive, so you have better odds of getting vitamin C in your drink when you use the fruit and keep your bottles covered, but in this case my main concern is the probiotics.

Raspberry Lemonade Water Kefir;

For raspberry lemonade water kefir, I use the juice and zest of one lemon along with a handful of fresh or frozen raspberries, lightly crushed.

Root Beer Water Kefir

I've also experimented with a more “kid friendly” root beer water kefir by using root beer extract and a little extra sweetener. I used one teaspoon of root beer extract combined with one tablespoon of sugar dissolved in 1/4 cup warm water, and mixed both into one quart of finished kefir. It makes a drink very much like minimally carbonated root beer. The longer it ages, the less sweet it will be. We use it on sno-cones, too. (See my youngest with the sno-cone maker here.)

Fuzzy Navel Water Kefir

We've found another fun flavor combination that we like a lot. To each quart water kefir, add 1 cup orange juice and 1/2 cup syrup from homemade canned peaches. This one is really good! I love this because the kefir ferments the sugar into bubbles, so you get less sugar but all the flavor. I think this would be a great way to use the syrup from other home canned fruits, too. If you've got a juicer, you could substitute fresh peach juice for the peace syrup, in season.

I've also tried various fruit juices. The I Love Water Kefir group on Facebook has some creative ideas, too. The strangest combo I've tried to date is pomegranate juice with nettle and rose hips. The flavor was a pleasant twist on an herbal infusion.

Bottling Your Water Kefir

When you're ready to bottle, strain out any fruit or herbs bits before bottling. I like to place a small strainer right into my funnel as I fill.

How to brew water kefir at home and make "water kefir soda" using a variety of fruit flavors. Brewing tips and answers to common questions.

I purchased my bail top bottles locally at the House of Homebrew, but they are available online. (Click here to order a set of bail top bottles.) I write the flavor and date bottled on masking tape and stick it on the jar to keep track of my various brews.

The more sugar in your second ferment, the more fizz you're likely to get. My lemon lime batches don't tend to get too fizzy (unless it's warm or they sit a long time), but the raspberry lemonade and fruit juice batches can get quite explosive. See the bubbles? Leave these too long or leave them in a warm place, and you'll have a geyser. I still have a bit of raspberry stuck under my cabinets from a crazed bottle of kombucha.

How to brew water kefir at home and make "water kefir soda" using a variety of fruit flavors. Brewing tips and answers to common questions.

Have you tried water kefir? What flavors do you recommend? Any other tips you'd like to share?

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Originally published in 2010, updated in 2017.

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