Separate eggs and beat egg whites until stiff and in an extra bowl beat heavy cream until stiff.
In another bowl mix together the egg yorks, sugar and the rum until foamy for about 5 minutes. Add the cooled (!) melted chocolate until smooth. Next add the egg whites and heavy cream. At last add the Chili powder. The mix is very fluid but it gets more firm in the fridge.
Now put in the fridge for at least 4 hours. Decorate with Chili flakes.