Make sure the can is fully immersed and that there’s an extra two inches (five cm) of water covering the can. This will prevent the can from overheating and possibly exploding, and prevent the milk from burning. By placing the can on its side, you will prevent it from bouncing around as the water boils. When it begins to simmer, turn it down to medium heat and allow to simmer for two to three hours (two hours for a lighter dulce de leche, or three hours if you want the sauce thicker and darker). Check on the can every 30 minutes. Turn the can every half hour to prevent scorching. Top up the water as needed to ensure there’s always one to two extra inches (two-and-a-half to five cm) of water covering the can.
कढ़ाई को सामान्य तापमान के पानी से भरें: बंद कैन को मध्यम या बड़ी कढ़ाई में रखें: पानी को तेज़ आँच पर उबलने दें: