Crock Pot Dulce de Leche Recipe 2 14 oz. cans sweetened condensed milk; 3 half pint size jars; crock pot; water Open cans sweetened condensed milk+pour into three half pint jars, dividing evenly. Put on lids+rings. Place jars into crock pot. Fill crock pot with water so that it covers top jars. Turn crock pot onto low+set timer for 10 hours. After 10 hours+remove jars from crock pot. Open lid+grab spoon!