Dulce de Leche

Heat all ingredients in a pan (with the marbles, if you want,) on a medium-heat stove, constantly mixing with a wooden spoon.

Once the sugar dissolves, set heat to very low, and keep mixing once in a while for approximately two hours. It should not boil, if it happens, set it aside, keep mixing and once the temperature lowers put it back on the heat.

Once the preparation gets thicker, be more careful and mix it more frequently so that it does not stick (and burn)

Once you get a consistency similar to that of a custard, set it aside and keep mixing for 10 minutes, until it gets

Once cold, put it on a glass jar and leave it in the fridge, or sterilize it.