01 - Heat milk in a saucepan over medium heat until it reaches 180°F, stirring occasionally to prevent scorching the bottom.
02 - Remove from heat and allow the milk to cool to 110°F, the optimal temperature for bacterial cultures to thrive.
03 - In a small bowl, whisk 2 tablespoons of the cooled milk with the plain yogurt starter until completely smooth and lump-free.
04 - Gently stir the starter mixture back into the cooled milk. Pour into a clean container, cover, and wrap in a towel or use a yogurt maker to maintain warmth.
05 - Let the mixture culture undisturbed in a warm place for 6 to 8 hours until fully set and tangy.
06 - Line a strainer with cheesecloth and place over a bowl. Pour the yogurt into the strainer and refrigerate for 1 to 2 hours until the desired thick consistency is reached.
07 - Transfer the thickened yogurt to a clean airtight container. Refrigerate until ready to serve.