In a big bowl, add 1 cup coffee flavored milk and 3 tbsp sugar, whisk well and add 2 tbsp vanilla extract. Add further more 3 tbsp espresso coffee and whisk. Add thevanilla custard mix to this and keep stirring.
In another large bowl, beat cream, sugar, vanilla extract and a pinch of National Salt until stiff peak forms. Set aside.
Using the bottom of a wooden spoon, poke holes all over the cake. Spread custard mixture on top, making sure to fill poke holes. Top with whipped cream and a dusting of cocoa powder. Sprinkle with chocolate shavings and serve.