Add the peanuts.
Use this mixture to coat the cake.
Leave to firm up in the refrigerator before serving.
Add the milk little by little.
Bring to the heat and heat the mixture, stirring continuously, until it thickens.
Add the butter cut into pieces and melt it.
Arrange the biscuits in a baking dish in a compact layer and cover them with the cream. Make other layers in the same way.
Melt the finely chopped chocolate in the hot cream.