01 - Pour the milk into a saucepan and warm gently over medium heat, stirring occasionally, until it reaches 185°F. Do not allow the milk to boil.
02 - Remove the saucepan from heat and let the milk cool to approximately 110–113°F.
03 - In a small bowl, combine the yogurt starter with a few tablespoons of the cooled milk and whisk until smooth.
04 - Fold the starter mixture back into the remaining cooled milk and stir thoroughly to ensure even distribution.
05 - Pour the mixture into a clean container or divide among individual jars. Cover loosely with lids.
06 - Place the containers in a warm environment—such as a turned-off oven with the interior light on or a dedicated yogurt maker—and allow the yogurt to incubate for 8 to 12 hours, or until it reaches your preferred consistency and level of tanginess.
07 - Transfer the set yogurt to the refrigerator and chill for at least 2 hours before serving.
08 - Keep refrigerated. The yogurt will maintain best quality for up to 1 week.