*To make Dulce de Leche on the stovetop, peel the label off the can but do not open. Add the can to a large pot of water and bring to a boil. Reduce heat to a simmer checking every 30-minutes that the water is still above the can, adding more when it gets low. Simmer for 3 hours. Remove can with tongs or slotted spoon, allow to cool to room temperature (contents are under pressure, do not open until cooled). Or you can add the cans to a slow cooker, cover with water and cook on low for 8 hours, allow to cool naturally before opening.