Kefir Soda instructions

Makes: One 32 oz bottle (about a quart)

  • Preps: 5 minutes
  • Culturing: 2-5 days, depending on the
    ambient temperature

You’ll need:


  • 1 sachet of Kefir Soda Starter
  • 2 cups of fruit juice or coconut water (with the least additives possible)
  • Just under 2 cups of water, lightly filtered or spring (not fizzy)


  • One thick 32 oz flip-top bottle, made for brewing (not from a craft store)
  • A measuring cup with a spout for mixing the ingredients
  • A funnel

Important! This product creates strong carbonation!
• Use thick flip-top bottles made for brewing (not from a craft store)
• Remember to carefully burp the bottle several times a day to release pressure. Otherwise, you may end up with kefir soda on your ceiling!


  1. In a measuring cup with a spout, mix the starter with some of the juice/coconut water until completely dissolved.
  2. Pour into a flip-top brewing bottle. A funnel will help.
  3. Add the rest of the juice and water, leaving 2 inches of headspace. Secure the top.
  4. Let ferment until well carbonated and tangy (about 3 days). In colder homes, fermentation might take 5 days or more. Important! Carefully burp the bottle several times a day to release the pressure, then secure the top again.
  5. When ready, place in the fridge to slow down the carbonation. You can enjoy the drink right away, but keep it stored in the fridge, and keep popping the top gently to release pressure daily, as needed. Consume within 1-2 weeks.

Note: Store the starter culture in the refrigerator or freezer until you're ready to use it.

Reculturing: For best results, reculture within 1 week. To make a new bottle, use ½ cup of kefir soda from your prepared kefir soda as a starter, 2 cups of juice or coconut water, and just under 1½ cups of water. DO NOT ADD NEW STARTER FROM A SACHET. Mix the ingredients and ferment in a sealed brewing bottle on the counter for a day or two, depending on the ambient temperature. Carefully pop the top several times a day to release pressure.

Kefir Soda starter

Go to Kefir Soda Fun & Fizzy Recipes

Go to Kefir Soda FAQs
Go to Kefir Soda Research