Let's start with pudding: Put 1 l of milk in a pan to boil, in another pan 1 l of milk. Let it boil. Pour the two vanilla puddings in a bowl, add 8 tablespoons of sugar and 8 tablespoons of warm milk, mix well, pour little by little in the pan with milk, stirring constantly, until the pudding has thickened. Remove from the heat and allow to cool slightly. In this way we proceed with the two chocolate puddings.
Prepare the biscuits on a tray, place them evenly, add 4 tablespoons of chocolate pudding over the biscuits, spread well, place another row of biscuits over the chocolate pudding, over which we add 4 tablespoons of vanilla pudding, spread well, put another layer of biscuits over, add another 4 tablespoons of chocolate pudding, put another layer of biscuits over which we add 2 tablespoons of pudding, spread well enough to cover everything.
Grate the household chocolate cake with a grater. We leave the cake for 3 hours or even until the next day!