Once the insert is cool enough to touch, begin adding the raw milk to your instant pot insert.
Using the steam setting, slowly heat the milk until the thermometer reads 110°F. Be sure to stir frequently to avoid scalding the milk touching the bottom.
While the milk is coming up to temperature, add the starter culture into a liquid measuring cup.
When your thermometer reads 110°F, remove from the insert from the instant pot and slowly ladle 1/4 - 1/2 cup of warm milk into the starter culture while vigorously whisking.
Vigorously whisk until there are no lumps left in the starter culture & milk mixture. If there are any lumps in this mixture, there will be lumps in the final product and it will make the yogurt unappetizing.
When there are no lumps, whisk the starter culture & milk mixture into the rest of the heated milk.
Replace the instant pot insert into the instant pot and secure the lid.
Press the “yogurt” button until it reads 24.