01 - Pour milk into a saucepan and heat over medium heat, stirring occasionally to prevent scorching. Continue heating until the milk reaches 180°F.
02 - Remove the saucepan from heat and allow the milk to cool down to 110°F. This temperature is optimal for activating the live cultures.
03 - In a small bowl, whisk together 2 tablespoons of the cooled milk with the plain yogurt starter until completely smooth and well combined.
04 - Pour the starter mixture back into the cooled milk. Stir gently but thoroughly to ensure the cultures are evenly distributed throughout the milk.
05 - Transfer the mixture to a clean container and cover. Wrap in a towel to maintain warmth or place in a yogurt maker. Let culture undisturbed for 6-8 hours until set.
06 - Line a strainer with cheesecloth and set over a bowl. Pour the cultured yogurt into the strainer. Refrigerate for 1-2 hours until the yogurt reaches your desired thickness.
07 - Transfer the thickened yogurt to a clean, airtight container. Refrigerate until ready to serve. The yogurt will keep for up to 2 weeks.