Fermented Sweet Potato

About Fermented Sweet Potato Recipe

This is going to rock your world. It did mine.

I started making fermented food for babies when I had my fourth child. I wanted to give my baby the best start and built on what I had done for my older three creating FIRST foods. F is for fermented foods as this helps a babies gut develop adding in loads of probiotic-rich foods. But I continue to make it to this day. Fermented Kumara as well call sweet potato in New Zealand has become a regular spread in wraps, sandwiches and on top of dosas for both myself and my now toddler. 

This fermented sweet Potato recipe will not only give you and your baby a good probiotic kick but will also give a load of prebiotics.

This is the double whammy for gut health.

What to do when Baby refuses?

Keep giving it to them. It can take 10-15 “trys” before they develop a taste for it. Try with food they already like. Have the expectation that at some point your child will train their taste buds to Fermented Sweet Potato and  eventually they will be happily devouring jam-packed nutrient spread/puree. 


  • 3 Sweet Potato (golden, purple or red all work well)

  • 2 garlic cloves

  • Culture starter or Whey

  • 2 tsp Himalayan salt

Step by Step Instructions

Step 1

Peel the Sweet potatoes and cut into chunks.

Step 2

Steam the sweet potato until cooked through. 

Step 3

Blend or mash the Sweet Potato with the salt into a smooth paste while hot. Use a little liquid if necessary. 

The mixture should become like a smooth paste. 

(Doing this step while hot makes the paste go smoother without as much liquid)

Step 4

Leave the Sweet Potato to cool. While you are doing that don’t forget to sterilize your jar. 

Step 5

Once cool, add in culture starter or whey and minced garlic cloves. 

Step 6

Spoon mixture into cooled sterilized jar. Pushing down with the back of a spoon so that no air holes are present. 

Step 7

Cut out a circle of baking paper and lay on top of your Sweet POtato mixture to seal it off from any air. Seal with Lid and leave in dark place for 3-7 days. 

Step 8

You will start to see air bubbles form in the sweet potato mixture. This is a sign that fermentation has started. After three days taste a little. The mixture will be a little sour and possibly fizzy. Leave out if you think it needs more fermenting time. 

Step 9

Store in the fridge. Because it is fermented, it can last for months in your fridge, but I am sure you will have eaten it before then. 🙂  

 Want a Road Map to Starting Solids?

Get a free email course that walks you through starting solids.  Tick all the boxes from giving your baby fermented foods to training their taste.

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