Preheat oven to 180°C.
Line 2 baking trays with baking paper.
Place sugar and cocoa into the Thermomix bowl and blend 10 sec/speed 9
Add chocolate, coconut, vanilla and salt and mix 10 sec/Reverse/speed 5
Add egg whites and mix 30 sec/Interval/dough setting.
Put the mixture into the fridge for 30 minutes.
Use an ice cream scoop to portion out the mixture onto the lined trays. Press the mixture into the scoop really firmly as it needs to stick together when cooking.
Bake for 15-18 minutes.
When cool, drizzle with melted chocolate and set.
Store in an airtight container in the fridge.