Preheat the oven with electrical heat at 180 degrees Celsius.
Cover a baking form with a baking paper.
Add the sugar and then the chocolate in the butter an stir until the chocolate has melted.
Add the eggs, salt, flour and baking powder and stir quickly. Stir 2/3 of the chocolate flakes in the batter.
Pour the batter in the baking form, and sprinkle the chocolate flake on top of the cake.
Place the cake in the middle of the oven for 30 minutes.
Test the cake with a knife tip to see so the cake doesn't get to dry.
Take out the cake from the oven an let it cool down.