01 - Pour whole milk into a saucepan and heat over medium heat, stirring occasionally, until temperature reaches 180°F. Monitor carefully to prevent scorching or boiling over.
02 - Remove saucepan from heat and allow 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 incorporated.
04 - Pour the starter mixture back into the cooled milk and stir gently but thoroughly to ensure even distribution of cultures throughout.
05 - Transfer mixture to a clean container and cover securely. Wrap container in a clean towel to maintain warmth or place in a yogurt maker.
06 - Let mixture ferment undisturbed in a warm location for 6 to 8 hours until fully set. Do not shake or move during this process.
07 - Line a strainer with cheesecloth and place over a bowl. Pour yogurt into strainer and refrigerate for 1 to 2 hours until desired thick consistency is achieved.
08 - Transfer strained yogurt to an airtight container. Refrigerate until ready to use. Keeps for up to 2 weeks.