Cold Maria cookie cake

Cook over medium heat, stirring constantly until thickened. Remove from heat and let cool slightly.
2. Prepare the chocolate coating:
Heat the other 500 ml of milk over low heat and add the chopped chocolate bar. Stir until completely melted.
Add the whipping cream and mix well. Remove from heat and let cool slightly.
3. Assemble the dessert:
In a baking dish, place a layer of cookies on the bottom.
Add a layer of the vanilla cream, spreading it evenly.