Start by melting the dark chocolate pieces in a bowl over hot water, then keep stirring until it becomes a smooth, even mixture.
Next, in a separate container, combine the condensed milk, cocoa powder and vanilla essence.
Then add the melted chocolate mixture to the contents of the container and mix well.
Then, in another bowl, whip the fresh cream to the consistency of whipped cream. Now carefully add the whipped cream to the chocolate mixture.
Finally, pour the mixture into a round mold, like the kind used for pudding, and put it in the freezer until it has the consistency of ice cream.