Chop the chocolate coating. Melt coconut oil and chocolate coating over a warm water bath. Whisk eggs, icing sugar, milk and cocoa with the whisk of the hand mixer until creamy and pour into the couverture mixture while stirring, mix well
Rinse out a box mould (26 cm long, 1.5 litre capacity) and line it with foil. Cover the bottom with some chocolate cream. Place 10 biscuits side by side. Pour a thin layer of chocolate cream on top and smooth it down. Repeat the process until all the biscuits and chocolate cream are used up. Cover with foil and chill for at least 5 hours, preferably overnight. Turn out of the mould and remove the foil. Cut the cake into slices
Waiting time approx. 5 hours