Heat half a decilitre milk and dissolve the cacao in it. Add the rest
of the milk and the condensed milk. Put
the mixture in ice cream machine
or put in the freezer, stirring every hour.
Mix the egg yolks,
the sugar and the milk together and heat the mixture, either au bain
marie or in the micro wave, first 30 seconds and then 15 seconds every
time. Keep mixing. When the mixture thickens and is hot add the cream
and the vanilla essence. Cool for one hour. Freeze for at least 4 hours,
stir every hour, or use an ice cream machine.