Homemade yogurt couldn’t be easier, especially when you use sous vide! I’ve developed a sous vide yogurt recipe that’s done entirely using sous vide, no stovetop.
When your water bath is preheated, set your jar on a scale and make sure it's zeroed out. Set it to grams. Pour milk until the jar is about 2/3 full. Make a note of how many grams of milk you added.
Put the lid loosely on the jar and add to the water bath. The water should go past the height of the milk but doesn't need to cover the top of the jar (it's okay if it does, though). Cook for 30 minutes at this temp.
Reduce the heat to 110 degrees F. To speed this up, add ice to the water bath. Once the water bath is 110 degrees F, let the milk sit in the water bath for 15 minutes.