Break the chocolate into small pieces and melt over hot water.
In a bowl whisk butter and sugar together. As you whisk, add the 4 egg yolks, one at a time.
In another bowl whisk 3 egg whites until frothy.
Let the heated chocolate cool down and pour it into the butter and egg mixture.
Then add the egg white mixture and stir thoroughly.
Pour the chocolate mixture in a floured and buttered oven tray & garnish with flaky almonds.
Set the oven at 175 degrees and bake for about 10 minutes.
To Serve: Serve the chocolate cake with vanilla ice cream.