Pour 8 cups of milk into the Instant Pot.
Put on the lid. NO need to turn the Steam Release Valve to seal.
Using the "Yogurt" feature on the Instant Pot, select "BOIL"
The Instant Pot will beep once it is done the "BOIL" cycle. Carefully remove the lid, it will be steamy.
Remove the inner pot and set in a sink of cold water.
Stir and monitor the temperature of the milk with a thermometer, until it reaches 100°F-108°F.
Dry off the outside of the inner pot and put back into the Instant Pot.
Add 1 cup of yogurt. Using a whisk or spoon, mix to incorporate thoroughly.
Cover pot with towel and glass lid. (can be any lid that fits)
Using the "Yogurt" feature on the Instant Pot select desired time for incubation. Normal times are 8 to 12 hours.
Once the incubation time has lapsed. Removed the inner pot with lid to the fridge. I like to leave it in the fridge overnight.
If you want a thicker Greek style yogurt, spoon the yogurt into a strainer to remove some of the whey.
Once the yogurt is the desired consistency, transfer it into glass containers. Make sure you label the jars.