Preheat the oven to 180 degrees Celsius and place a baking paper on a baking tray.
Whip the egg whites in a bowl and add the sugar bit by bit and continue whipping until you have a hard foam.
Mix together in a bowl the icing sugar, ground almonds and grated chocolate.
Add gently the dry ingredients in the whisked egg foam.
Fill a macaroon piping bag or use two spoons to place small balls on the baking sheet. Do not place them to close to each other.
Tap gently the baking sheet a few times on the work surface to help the macaroon mixture to settle and to break any air bubbles.
Bake them in the preheated oven for about 10 minutes. They are cooked when they feel firm.
Remove from the baking paper only when they are cold otherwise they will brake.
The macaroons can be eaten immediately in that case they are very dry or let them in a room for a few hours so they are more chewy and tasty.