How to Make Lacto-fermented Blueberry Soda

Learn to Ferment

Lacto-fermented blueberry soda is not only easy to make at home, it's also a healthful alternative to sugar and chemical-filled commercial sodas.

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Before I share my lacto-fermented blueberry soda recipe, let me explain first why you should make it.

Did you know that at one time sodas were actually considered a healthful beverage?

I know that’s hard to imagine but it’s true.  Today’s commercial sodas are so full of sugar, caffeine, artificial colors and preservatives that most people have no idea that they evolved from healthful lacto-fermented beverages.

Traditionally, lacto-fermented beverages were made from the roots, leaves, fruits and even barks of various herbs, plants and trees.  For example, root beer was commonly made from the roots of the sassafras plant. Ginger ale was made from ginger (a root), of course.

Lacto-fermentation is a natural process by which the starches and sugars in fruits, vegetables and dairy are chemically broken down by naturally occurring bacteria and converted into lactic acid (thus, the “lacto” of lacto-fermentation).

More importantly these chemical changes have some remarkable health benefits, especially for digestion.

Health Benefits of Lacto-fermentation

Lacto-fermentation presents our body with valuable enzymes, probiotics and actual nutrients such as trace minerals in highly absorbable form. Furthermore, the carbonation in lacto-fermented soda is a natural byproduct of the fermentation process. This is of course what gives soda its notorious fizziness.

Because modern sodas are NOT lacto-fermented, carbonation is mechanically added.  While this doesn’t seem to have a negative health impact (though some believe it does), it certainly doesn’t add anything beneficial.

And unlike the super-sized portions of today’s sodas, they were commonly consumed in small amounts and were often used for medicinal purposes.

Sally Fallon, in Nourishing Traditions, writes, “Throughout the world, these lactic-acid containing drinks have been valued for medicinal qualities including the ability to relieve intestinal problems and constipation, promote lactation, strengthen the sick and promote overall wellbeing and stamina.  Above all, these drinks were considered superior to plain water in their ability to relieve thirst during physical labor.”

Another benefit of lacto-fermented sodas is that they contain considerably less sugar as the bacteria feed on and convert the sugar during fermentation.  And of course, there’s no genetically modified high fructose corn syrup or artificial sweeteners.

My lacto-fermented blueberry soda was actually my first attempt at making real soda so I don’t claim to be any sort of expert.  However, my first batch came out beautifully and I’m pretty confident yours will too if you follow my simple recipe.

One thing you will need to increase the carbonation is soda bottles as they provide the perfect vehicle to trap carbon dioxide and increase the fizziness.

As proof, here’s a short video of myself opening my first batch:

I picked up the soda bottles at a local kitchen supply store.

You can also click here to find a good source on Amazon.

OK, let’s get to the recipe!

How to Make Lacto-fermented Blueberry Soda

Makes about 2 quarts

Ingredients

Directions

1. Simmer blueberries and sugar in water for about 20-30 minutes.

2. Cool to room temperature and strain out the blueberries.

3. Transfer what’s now essentially blueberry juice to a 2 quart glass ball jar or demijohn.  Like so:

Lacto-fermented blueberry soda is not only easy to make at home, it's also a healthful alternative to sugar and chemical-filled commercial sodas.

4. Add whey and let it ferment for at least 3 days.  Look for visible signs of fermentation via a slight fizziness.  You can let it go longer if you’d like a less sweet soda as the bacteria will continue to feed on the sugars.  I let mine go about 5 days but you can go as long as 10 days.  Taste the soda as you go to get the sweetness you desire.

Note:  there are several options for using starter cultures.  If you use whey, you’ll have to make it yourself at home (don’t worry, it’s ridiculously easy).  Other starter cultures include a ginger bug, water kefir and champagne yeast.

5. Transfer blueberry soda to soda bottles via a funnel or measuring cup.  Like so:

Lacto-fermented blueberry soda is not only easy to make at home, it's also a healthful alternative to sugar and chemical-filled commercial sodas.

My two quarts fit perfectly into these three soda bottles:

Lacto-fermented blueberry soda is not only easy to make at home, it's also a healthful alternative to sugar and chemical-filled commercial sodas.

6. Keep the soda bottles at room temperature and check every day.  As the video above showed, the carbonation can increase rapidly!  Make sure to open the bottles every day to let some of the gasses escape.  After a few days, you can move the bottles to your refrigerator where the fermentation will dramatically slow down.

7. Enjoy!

Want more recipes?  Here’s a fantastic resource with not only great soda recipes but many other traditionally brewed beverages as well such as cider, wine and kombucha.

Lacto-fermented blueberry soda is not only easy to make at home, it's also a healthful alternative to sugar and chemical-filled commercial sodas.

Click here to check out True Brews on Amazon.

Printable Blueberry Soda Recipe

Lacto-fermented Blueberry Soda Recipe

Lacto-fermented blueberry soda is not only easy to make at home, it's also a healthful alternative to sugar and chemical-filled commercial sodas.

Course Drinks
Cuisine American
Prep Time 1 hour 30 minutes
Total Time 1 hour 30 minutes
Servings 2 quarts
Author Craig Fear

Ingredients

  • 4 cups organic blueberries
  • 1 cup organic sugar or dehydrated cane juice or rapadura
  • 1/2 cup whey or another starter culture
  • 2 quarts filtered water

Instructions

  1. Simmer blueberries and sugar in water for about 20-30 minutes.

  2. Cool to room temperature and strain out the blueberries.

  3. Transfer what’s now essentially blueberry juice to a 2 quart glass ball jar or demijohn. 

  4. Add whey and let it ferment for at least 3 days. Look for visible signs of fermentation via a slight fizziness. You can let it go longer if you’d like a less sweet soda as the bacteria will continue to feed on the sugars. I let mine go about 5 days but you can go as long as 10 days. Taste the soda as you go to get the sweetness you desire.

  5. Transfer blueberry soda to soda bottles.

  6.  Keep the soda bottles at room temperature and check every day. Make sure to open the bottles every day to let some of the gasses escape. After a few days, you can move the bottles to your refrigerator where the fermentation will dramatically slow down.

Additional Fermented Soda Recipes:

Blueberry
Raspberry
Watermelon
Mango
Lemon Lime
Cream
Thai

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Lacto-fermented blueberry soda is not only easy to make at home, it's also a healthful alternative to sugar and chemical-filled commercial sodas.

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About the Author

Craig Fear is the creator of Fearless Eating and the author of three books, The 30-Day Heartburn Solution, Fearless Broths and Soups and The Thai Soup Secret. After years helping clients with digestive issues, Craig decided to pursue writing full-time. He intends to write many more books on broths and soups from around the world! Click here to learn more about Craig.

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