Soy Yogurt

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Making soy yogurt at home is easy, convenient and cost effective.

Yogurt is fermented milk, with a bacterial culture added and is incubated. The method below is for an Instant Pot with a yogurt function. If you don’t have an Instant Pot, check the Notes section for other methods on how to incubate yogurt.

Yield: 4 cups

Making yogurt at home is easy and tasty and it costs only a fraction compared to what you buy in the store. Once you have your yogurt made, it can be enjoyed as is or with a scoop of Fruit & Berry Topping. It can also be made into Greek Yogurt or a Tangy Yogurt Cheese.

Yogurt is made with only two ingredients

  1. Soy milk
  2. Yogurt starter

Soy Milk

It’s important to use unsweetened soy milk with no sweeteners, stabilizers nor enriched or fortified. The ingredients must be just beans and water. Eden Soy is a reliable shelf stable brand available in most stores as well as online. Soy milk with no additives can also be purchased at Asian markets.

Yogurt Starters

There are three options that can be used:

  1. A commercially prepared yogurt starter which comes in a powder form and is available in the refrigerator section in most health food stores. Make sure it’s vegan. Dairy yogurt starters are not interchangeable with vegan starters.
  2. Probiotics come in capsule form and are available in various brands. (I use Optima Probiotic capsules with success).
  3. Another yogurt can be used. Ensure that it is an unsweetened plant-based yogurt with active cultures. If you make yogurt on a weekly basis this is a cost effective method. Each time you make a batch of yogurt set aside a ¼ cup of fresh made yogurt to be used in the next batch. With this method be sure to isolate this yogurt so it doesn’t get accidently contaminated by dipping into it with an unclean spoon.

How to Use Different Yogurt Starters

To avoid contamination always use clean utensils, containers, and freshly opened milk.

  1. Commercially prepared yogurt starters will need to be dissolved in the milk. Follow the directions on the package.
  2. For probiotic capsules, it’s convenient to open a capsule and empty the contents directly into the milk carton. Give it a good shake then pour contents into your choice of incubation container.
  3. When using another yogurt add about ½ cup of milk to the yogurt and mix until smooth. Add this mixture to the remainder of the milk that will be cultured and stir well to distribute.

Yogurt Containers

  1. Regular mason jars. During incubation, these can be used with or without lids.
  2. A heat resistant bowl. If you decide on this method, make sure the bowl fits into the Instant Pot and that it’s easy to remove. Using an Instant Pot Sling can be handy.
  3. Pour the milk directly into the Instant Pot liner. This method is convenient if you will be transferring the yogurt to a different container after it has cultured. I use this method to make Greek Yogurt and this creamy Tangy Yogurt Cheese.


  • Allow a minimum of 8 hours and as long as 12 hours. The longer the time, the more tart the yogurt will get. I set mine around 9 to 10 hours.

Instructions Start

How to Make Soy Yogurt

Ingredients when using probiotics as your starter

  • 4 cups (946 ml/1 litre) unsweetened soy milk
  • 1 probiotic capsule, (contents only)

Ingredients when using yogurt as your starter

  • 4 cups (946 ml/1 litre) unsweetened soy milk
  • 1/4 cup plain yogurt

Ingredients when using commercial yogurt as your starter

  • Follow package instructions (I’m not familiar with commercial starter)

What to Do

  1. Mix your choice of yogurt starter with the soy milk. Ensure starter is dissolved/has no lumps.
  2. Pour milk into your choice of bowl or jars and put it into the Instant Pot.
  3. Lock the pressure cooker lid and select the yogurt setting. The time will default to 8 hours. Leave at default or adjust the time to your preference. Do not disturb until the cycle is complete. The yogurt will be warm and not completely set.
  4. Remove the yogurt and place in fridge for at least 4 hours or as long as overnight. During this process the yogurt will get more firm. This is important especially if proceeding to make Greek Yogurt or Tangy Yogurt Cheese.
  5. Use yogurt within a week, however when using fresh yogurt as a culture, for best results, use it within 5 days.


  • If you don’t have an Instant Pot, then you can use a yogurt maker. Another option may be to use the oven with the light left on, however before proceeding with this method, check that your oven light will meet the temperature criteria. For yogurt to culture it needs a consistent warm environment between 100-110°F for the duration of 8 to 12 hours.
  • When making yogurt, sometimes it may separate into curds and whey. This is normal and if this happens, put yogurt in fridge and allow it to set for at least 4 hours to overnight. Pour off the whey and use an immersion blender to make creamy. (The whey is full of nutrients, it can be added to smoothies or drink plain).