Pour the coconut milk and maple syrup into the pot of the Instant Pot. Whisk well, then press the “Yogurt” button, and adjust the setting until you see “boil.” Let the Instant Pot run through the process it’s scalding the milk, and getting it to the right temperature but it doesn’t actually boil, whisk occasionally. There is no need to place the lid on the Instant Pot during this stage, or you could use the glass lid.
When the Instant Pot beeps that it is finished the scalding process, allow the milk to cool until it is between 100º and 110º. This takes roughly half an hour - to 45 minutes.
If using starter yogurt: When the milk is at the correct temperature, ladle out about 1/2 cup of the warm milk into a small bowl, and whisk with the 3 tablespoons plain starter yogurt until smooth. Pour the mixture back into the Instant Pot and whisk well.
If using freeze-dried yogurt culture or probiotic capsules: When the milk is at the correct temperature, sprinkle the starter culture, or open 2 of the capsules and sprinkle over the milk, and then whisk very well to combine.
If using a thickener, sprinkle on top of the warm milk, and then whisk very well to combine. I have not tried gelatine as a thickener, however I would recommend following the usual method for working with gelatin, first allow it to bloom in cold water, then whisk it into some warm milk, and then add it to the rest of the milk mixture.
Close the lid of the Instant Pot (no need to seal), and press the “Yogurt” button. Adjust the setting until you see the time display.
Set for the desired amount of fermentation time. Eight hours is bare minimum, and I would not recommend less than 12 hours.
I prefer yogurt that has been fermented closer to 18 hours because it results in tangy yogurt— and it has more probiotics! I did all my batches at 18 - 24 hours, and was very happy with the tang.
When the fermenting time is up, flavour with vanilla extract, and transfer the yogurt to a glass storage container and keep in the fridge. It will thicken slightly as it cools.
I have not used gelatine as a thicker, the agar agar did not thicken the yoghurt to the extent I anticipated, it was not as thick as Greek Yoghurt, but it was still a lovely consistency and I was very happy with it .