1: Chop the dark chocolate into small pieces.
2: In a pot, add sugar and cocoa powder. Add the milk while stirring gradually.
3: Add cinnamon and a pinch of salt. Bring the milk to a simmer.
4: Mix together the cornflour with some milk and add it to the pot. Keep stirring for a minute until smooth.
5: Keep the heat on low and add the chopped chocolate.
6: Stir until the chocolate melts and it becomes smooth.
7: Serve hot. You can optionally top it with marshmallows.
