Prepare all ingredients.
Increase the height of ramekin by fixing a band of parchment paper folded in two around.
Beat the egg very firm with a pinch fine salt.
Dissolve the instant coffee in 2 Tablespoons water or use strong coffee like "espresso".
Place in a bowl the chocolate melted in a microwave.
Add the egg yolks...
...and coffee.
Mix well using a whisk.
If the cream separates slightly, it is not a problem.
Add the firm whites...
...and mix delicately using a spatula.
Pour this preparation in the ramekin.
Reserve in the fridge for 2 hours minimum.
Just before serving, gently remove the parchment paper.
Sprinkle the surface of soufflé with bitter cocoa...
...and a little icing sugar. Reserve in the fridge until serving.