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    Home » Ferment

    How to Make Water Kefir

    Published: Jul 15, 2018 · Modified: Oct 17, 2022 · 13 Comments

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    This post contains affiliate links. As an Amazon Associate I earn from qualifying purchases.

    Learn how to make water kefir, a fermented, vegan probiotic drink!  It’s easy to make at home, and is a delicious, light, and flavorful alternative to milk kefir or kombucha.

    water kefir in glasses on a tray


    Where are my kombucha fans?

    For those of you who buy store-bought kombucha, you may have noticed another type of bottled drink appearing right next to it on the shelves.

    A lighter, less vinegary drink that tastes faintly like sparkling juice or sparkling lemonade.  A drink that is perfect for summer heat.

    Water kefir.

    Not sure if you’ve seen it?

    It isn’t always labeled clearly – sometimes it’s marked “vegan probiotic drink.”

    The easiest brand to find right now is Kevita. 

    It’s almost always flavored. My favorites are lemon cayenne and lemon ginger.

    Just like kombucha, it tends to cost about $4 a bottle – a price tag that’s fine for once in a while, but can really start to add up if you drink it often. 

    The good news is, making water kefir is EASY.  This post will walk you through how to make your own at home!

    Water Kefir vs. Kombucha

    Both water kefir and kombucha are lightly fermented, probiotic-packed drinks. 

    Both are made with sugar water, both are typically sold carbonated, and both are often sold flavored.

    Kombucha is made from black tea and sugar (and it’s caffeinated).

    Water kefir is made from sugar water— no tea, no caffeine. 

    It’s also quicker and simpler to make than kombucha.

    Both use a starter culture – a colony of yeast and bacteria – which helps transform the unfermented beverage safely into a fermented one. 

    Kombucha uses a the starter culture called a SCOBY.

    Water kefir uses a starter culture called grains.

    Interested in kombucha?  Learn how to make a kombucha SCOBY, how to make kombucha and how to make hard kombucha.

    Water Kefir vs. Milk Kefir

    Another drink you might have seen is milk kefir. 

    Milk kefir is a thick, probiotic milk drink that’s generally found in the dairy section near the milk and cream.

    Both water kefir and milk kefir are made with kefir grains— but they’re slightly different strains of bacteria. 

    And as the names suggest– milk kefir grains ferment milk, and water kefir grains ferment sugar water.

    water kefir grains and bottled water kefir

    Can I Use Milk Kefir Grains to Make Water Kefir?

    Maybe. 

    You can try using your milk kefir grains, but it might not work, and the grains may not live. 

    If the grains DO live, they might not continue to reproduce.

    Keep in mind that if you do successfully convert milk kefir grains into water kefir grains, you can’t use them for milk again.

    I recommend using water kefir grains, not milk kefir grains, for this drink.

    Where Can I Buy Water Kefir Grains?

    If you have a friend who makes water kefir, check with them first! 

    The grains multiply quickly, and they probably have extra to share.

    If you need to buy grains, try checking in local health food stores, or buy them online. 

    I bought these water kefir grains on Amazon, and I highly recommend them– they worked perfectly and multiplied beautifully.

    Kefir shopping tip: I always recommend buying live, active kefir grains instead of dehydrated grains.

    Do I Need Special Equipment?

    Other than the grains, the only “special” equipment you might want are pressure-resistant bottles for carbonating.

    You can use plastic soda bottles, reuse store-bought kombucha bottles, or use pressure-resistant, swing-top bottles or growlers intended for brewing beer or other carbonated drinks. 

    I use pressure-resistant swing-top bottles that I bought on Amazon.

    Avoid using decorative bottles to carbonate, because they might burst.

    Don’t want to find the right bottles?  You can also skip the carbonation phase.

    You might also want a funnel to help pour the finished product into the bottles.

    I use this Squish mini funnel because I can easily fit it into a kitchen drawer.

    Flavoring Ideas

    Just like with kombucha, you can either add flavored juice or lemonade directly, or do a second fermentation with diced fruit and herbs.

    Keep in mind that using juice will usually give you a sweeter drink, and fruit a slightly less sweet kefir.

    Here are some of our favorite flavors:

    • Lemon-Ginger:  Use a combination of both flavoring techniques. 
      Do a second fermentation with sliced ginger for 1-2 days. 
      Add lemonade when bottling.
    • Lemon-Cayenne:  Use a combination of both flavoring techniques. 
      Do a short second fermentation with one dried cayenne pepper.  Taste after 2 hours, and ferment longer if desired. 
      Add lemonade when bottling.
    • Coconut Water + Herbs: Use a combination of both flavoring techniques. 
      Do a second fermentation with fresh mint and/or basil for 1-2 days.  Add coconut water when bottling.
    • Fruit Juice: Add your favorite fruit juice when bottling
    • Apple + Spices:  Do a second fermentation with diced apple, cinnamon, and clove for 2 days. 
      Taste, and add more sweetener (juice, simple syrup, stevia etc.) if desired when bottling.
    water kefir in glasses on a tray (how to make water kefir)
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    5 from 7 votes

    How to Make Water Kefir

    Love water kefir? This fermented, vegan probiotic drink is easy to make at home, and is a delicious, light, and flavorful alternative to milk kefir or kombucha.
    Author: Sarah Trenalone
    Prep Time30 mins
    Cook Time2 d
    Total Time2 d 30 mins
    Course: Drinks
    Cuisine: American
    Diet: Gluten Free, Vegan, Vegetarian
    Servings: 3 people
    Calories: 40kcal
    Prevent your screen from going dark

    Ingredients

    Basic Water Kefir:

    • 8 cups water (dechlorinated water or previously boiled water)
    • ½ cup sugar (white, turbinado, or brown)
    • ¼ cup water kefir grains (amount approximate)
    • 1 lemon, juiced

    Optional Flavoring Add-Ins:

    • fruit, spices

    Equipment Needed While Fermenting:

    • half gallon glass jar (or multiple smaller jars)
    • paper towels or napkins (avoid using cheesecloth if you have a problem with fruit-flies)
    • rubber band

    Equipment Needed While Carbonating / Storing:

    • mesh sieve or strainer
    • funnel
    • 1 2-liter soda bottles OR 3 16-oz bottles, PLASTIC or PRESSURE-RESISTANT swing top glass bottles

    Instructions

    Fermenting:

    • Add water and sugar to the glass jar, and mix until sugar is dissolved.  (This is easiest if the water is warm.)
      Note: If water is hot, allow it to cool to room temperature before proceeding to the next step.
    • Add the water kefir grains.  Cover with a paper towel or napkin, and secure with a rubber band.  Allow to ferment for 48-72 hours.  
      Is it Working?  There will be few, if any, signs that your kefir is fermenting until you move onto the carbonation step.
      Fermenting Time: The first time using your kefir grains, they may be sluggish.  Give them the full 72 hours to ferment.  In warm rooms, your kefir will generally ferment quickly (48 hours) and in cooler rooms, it will likely take longer (72 hours).
      Tip: Write the start and estimated end date on the paper towel.
    • Pour the kefir through a mesh sieve into a clean jar or pitcher to strain out the water kefir grains.  
    • Add the lemon juice to the fermented water kefir.
    • Set the grains aside in a clean jar or bowl, and then add more sugar water to start the process over again.
      Tip: If you need to store the grains, store them in a new batch of sugar water, or in some of the current batch of sugar water.

    Making Flavored Water Kefir: (Optional, but Recommended)

    • Technique 1 (2nd Fermentation):
      Add fruit, spices, and / or herbs to the jar of fermented water kefir.  Cover with a paper towel and rubber band, and ferment another 1-2 days.
      Tip: Never add the fruit (or other flavorings) to the water kefir while the kefir grains are still in the jar– it could harm the grains.
      Strain out any added flavorings, and proceed to the bottling step.
    • Technique 2 (Flavor Added to Final Bottling):
      Add desired amount of juice or lemonade to the kefir.

    Bottling Water Kefir:

    • Use a funnel to pour the water kefir into bottles.  Refrigerate immediately, or proceed to the carbonation step.

    Carbonating Water Kefir:

    • Seal bottles.  Check after 24 hours, or after 12 hours in warm rooms.  The water kefir is ready when the plastic bottles are rock hard, or when glass bottles begin to fizz when opened.

    Notes

    Makes ½ gallon, or 3 20oz bottles.
    Troubleshooting– My water kefir didn’t carbonate:
    • Ferment longer: It likely wasn’t fully fermented.  Try fermenting your next batch for one day longer.  This is especially likely to happen on your first batch of kefir with grains that have been in storage.  You can still drink the kefir, just ferment the next batch for a longer time period.
    • Go organic: Try using organic sugar.
    • Soak the Grains in Minerals: Add ⅛ tsp sea salt, ¼ tsp baking soda, and ½ tsp molasses to the sugar water.  Soak grains for at least a week, or up to a month.  Don’t drink this batch– drain the liquid away and add the kefir grains to a new batch.
    Nutrition information changes as this drink ferments, especially the sugar content.  The nutrition estimates for this recipe are based on a nutritionix estimate of general water kefir, and do not include the additional flavoring.

    Nutrition

    Calories: 40kcal (2%) | Carbohydrates: 5.8g (2%) | Protein: 4g (8%) | Fat: 0.8g (1%) | Saturated Fat: 0.1g (1%) | Sodium: 30mg (1%) | Potassium: 95mg (3%) | Fiber: 2.8g (12%) | Sugar: 1.7g (2%) | Vitamin C: 2.1mg (3%)
    Tried this recipe?Leave a comment and rating below!
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    About Sarah Trenalone

    Sarah is the primary creator at Champagne Tastes. She's a photographer, food writer and traveler, and is certified in Backcountry Kitchen and Backcountry Navigation from the Colorado Outward Bound School and Identifying Wild Plants from Backpacker.

    Reader Interactions

    Comments

    All commentsI made thisQuestions
    1. Dawn - Girl Heart Food

      July 16, 2018 at 8:21 am

      5 stars
      I’ve been spending about $4-5 per bottle on kefir water, I think it would be a great idea to make my own! Love that you mentioned lemon cayenne….that’s hubby’s fave! I just want to reach out and grab a glass from my screen 🙂

      Reply
      • champagne-tastes

        July 16, 2018 at 8:38 am

        It really adds up doesn’t it! If you lived closer I’d share my kefir grains with you 😀

        Reply
    2. Anne

      July 17, 2018 at 4:45 pm

      5 stars
      This is so interesting! I know about kombucha, and kefir milk, but I’ve never noticed kefir water. I’m kind of dying to try this little kitchen experiment but also kind of worried about my science skills!

      Reply
      • champagne-tastes

        July 17, 2018 at 7:51 pm

        Your science skills will be totally perfect! It’s easy 😀

        Reply
    3. Kitty

      July 21, 2018 at 8:37 pm

      5 stars
      You can make kefir with water? My friend makes it with raw milk and it tastes gross. But I loved the probiotic benefits. Have to try this!

      Reply
      • champagne-tastes

        July 21, 2018 at 8:38 pm

        You sure can!! And it tastes totally different than milk kefir, so it’s definitely worth trying even if you don’t like the milk kind!

        Reply
    4. Christine

      July 22, 2018 at 9:04 am

      5 stars
      Loving all of your kefir resources here! It’s not something I’ve tried to make at home yet but I am really inspired to try it soon. Love the idea of apple cinnamon flavoring!

      Reply
    5. Joyce Bettridge

      April 19, 2019 at 11:14 pm

      I’m using my water kefir grains for the first time. I first hydrated them according to directions. The kefir has been fermenting for two days. It tastes really sweet. Will some of the sweetness go out if I ferment them for one more day? I plan to add some elderberries and do a second fermentation but don’t want an overly sweet brew.

      Reply
      • Sarah

        April 19, 2019 at 11:15 pm

        Hi Joyce! Sometimes it takes a couple of times for the grains to start fermenting after you rehydrate them. (It’s like they need to wake up a little more.) I’d probably drain the water and try one more time!

        Reply
    6. Bobbie

      August 05, 2020 at 5:54 pm

      5 stars
      Just started making this. I love it. And so easy. Thank you, Sarah, for the inspiration.

      Reply
      • Sarah Trenalone

        August 05, 2020 at 6:10 pm

        yay!!! I’m so glad you loved it 😀

        Reply
    7. Amanda Armagost

      September 08, 2022 at 9:34 pm

      This sounds so cool and I already ordered from the link! I want to save my grains and keep reusing them. But what about it I go on vacation for a week? Can I leave it in the fridge without a problem?

      Reply
      • Alisha Trenalone

        September 09, 2022 at 7:44 pm

        Hello! A week in the fridge shouldn’t be a problem at all!

        -Alisha at Champagne Tastes

        Reply

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