For a large rectangular birthday cake (serves 12)
(2 biscuits width, 5 biscuits lenghth, 5 biscuits height)
To be made one day ahead of time78 square tea biscuits
2 cups expresso coffee (tepid)
120g (4.2 oz) granulated sugar
120g (4.2 oz) unsalted butter, at room temperature, until “soft”
4 eggs, at room temperature
200g (7 oz) dark chocolate (mine is baking chocolate from Lindt)
25cl (1 cup) liquid whipping cream1 tbsp grand marnier (optional)
In a mixing bowl, mix egg yolks and sugar until pale yellow.
Then add "soft” butter. Mix well, using a whisk (or an electric mixer if you find it easier).
Whip the egg whites until stiff. Combine them carefully with the “buttery” mixture until smooth.
Line a loaf cake mold with film paper.
Pour the coffee in a soup plate (1 cup first, and when empty, the second cup).
Add grand marnier in the coffee plate if desired.
Soak 10 teabiscuits in the coffee,one by one, and place them side by side, in a single layer, making a rectangular shape (2 biscuits * 5 biscuits).
Beware, if the coffee is hot, the biscuits will collapse.
Cover with a fourth of the cream mixture.
Repeat with the other biscuits 4 times (4 more layers of 10 bicuits each, each covered with a 1/4 of the mixture, but the 5th layer (the top layer) must not be covered with cream.
The day after (at least 3 hours in advance), remove from the fridge and unmold the cake by inverting the mold on a pastry sheet lined with parchment paper.
Heat liquid cream in a sauce pan. When simmering, add chopped chocolate.
Mix (out of the heat), until smooth.
Cover the cake (top and sides) with the melted chocolate cream.
Do not worry if the chocolate spreads everywhere in the plate : after a few hours in the fridge, the chocolate will be more "solid" and you will be able to cut the sides properly.
Let stand one hour at room temperature then in the fridge for at least 3 hours.
Decorate with golden edible powder, using a pastry brush.
Add golden edible glitters if you like.
To serve, cut into slices just like a loaf cake. VOILA!