Melt chocolate in a bain-marie.
Rub the sugar with the soft butter, gradually add the eggs and the cooled melted chocolate.
Add cocoa, flour and salt and mix well.
Heat the waffle maker and put 1 tablespoon of the composition on each plate.
Close and leave for about 1-2 minutes (depending on each device).
Check that when they are browned, remove them and repeat the operation.
They will be quite soft when you take them off, they will harden after they cool down.
Decorate them with powdered sugar.
You can taste them warm, they are very good and chocolatey.