Put the cream puffs from the package directly into a mold (they should not be layered). Melt the chocolate in a water bath and whip the cream in the meantime.
Mix the egg with the powdered sugar, cinnamon and coffee, then stir the cream into the chocolate. Stir in the egg mixture until it is a homogeneous mass. Pour over the cream puffs and place in the fridge for about 3 hours.