Start with a fat less chocolate sponge and slice into layers- give it a very generous drink of Kirsch.
For true Retro points it has to be tinned Cherry Pie filling next.
Then add a layer of softly whipped cream.
Next layer of sponge on.
More pie filling and cream.
More cake, more booze....
Top the cakes with cream and even out the top.
Pipe some fancy twirls of cream around the edge of the Gateaux.
Add some cherries and a drizzle of melted chocolate
I give you the very Retro, very wonderful, Black Forest Gateaux.