[header] How to make lemon yogurt [title] Build a water jacket. [step] Put your bigger stock pot in the sink, and place the smaller pot inside it. Fill the larger pot with water until you get about halfway up the side of the smaller pot. 
During this step, your milk and starter yogurt should be at room temperature. [substeps] This step is optional, but it can help keep your results consistent and prevent the milk from scalding.