This is what to do with the aforementioned ingredients:
- melt the chocolate with the butter (in a bowl over boiling water)
- set it aside to cool to room temperature
- whisk the egg whites and the salt until stiff peaks form
- to the egg whites, add the sugar slowly until the texture is shiny
- stir the egg yolks with the chocolate
- fold the egg whites in the chocolate mixture, spoon by spoon
- in the end, add three tablespoons of the cold coffee
- place into ramekins and set to cool in the fridge for at least an hour until you serve
- for decoration, whisk the double cream and dust some chocolate powder or cocoa
...and voila!