Heat milk in a large pot on low to 180 degrees F.
Remove from heat and allow to cool to about 110 degrees.
Ladle a little bit of the milk into a smaller bowl.
Pour in the freeze-dried yogurt starter (or 1/4 cup of yogurt) and whisk until combined.
Pour back into a large pot and stir into the rest of the milk.
Pour into the Instant Pot (or small incubator) and incubate for 8-10 hours.
Once done, cover and place in the fridge for several hours or overnight.
Ladle into airtight containers and store in fridge.