This recipe is the lovers' sexy midnight snack in the movie It's Complicated, starring Meryl Streep and Steve Martin.
 
For the cake 
 
100g soft butter 
250ml milk 
300g self-raising flour, sifted 
100g plain chocolate, melted 
15g cocoa powder, sifted 
1 tsp bicarbonate of soda, sifted 
225g caster sugar (golden,
         if you can find it) 
1 tsp vanilla 
3 eggs 
 
For the icing 
 
225g plain chocolate, broken up 
100g butter 
142ml carton double cream 
 
1. Preheat the oven to 180C. Grease a 20cm round, deep cake tin and line with baking paper. Place all of the cake ingredients in a large mixing bowl and whisk thoroughly until smooth. Spread into the cake tin and bake for an hour or until the sponge is firm in the centre. Then cool for 10 minutes, before turning out on a rack to cool. 
 
2. Meanwhile, to prepare the icing, melt the chocolate and butter together in the microwave for around 3 minutes, stirring halfway through. Stir until smooth, then beat in the cream and let it cool a little. 
 
3. Halve the cake through the middle. Spread a quarter of the icing on one half and sandwich both sides together. Spread the rest over the tops and sides. 
 
Jane recommends: Decorate the top of the cake with halved fresh strawberries and whipped cream laced with icing sugar and a drop of vanilla essence for that extra special touch.