01 - Pour whole milk into a saucepan and heat over medium heat, stirring occasionally to prevent scorching, until it reaches 180°F.
02 - Remove the saucepan from heat and allow the milk to cool down to 110°F.
03 - In a small bowl, combine 2 tablespoons of the cooled milk with the plain yogurt starter. Whisk until completely smooth.
04 - Pour the yogurt starter mixture back into the cooled milk. Stir gently but thoroughly to ensure even distribution.
05 - Transfer the milk mixture to a clean container and cover securely. Wrap the container in a towel to maintain warmth or place in a yogurt maker.
06 - Let the mixture culture undisturbed in a warm location for 6 to 8 hours until the yogurt has set completely.
07 - Line a strainer with cheesecloth and place over a bowl. Pour the set yogurt into the lined strainer. Refrigerate for 1 to 2 hours until the desired Greek-style thickness is achieved.
08 - Transfer the thickened yogurt to a clean airtight container. Refrigerate until ready to serve.