Creamy dessert with whipped cream, cookies and chocolate frosting: No-bake cake

Ideal to surprise family or guests on any occasion, the recipe is described below:

Ingredients
For the base and filling:
200 g biscuits (Maria or Digestive type)
700 ml milk
80 g vanilla pudding powder
250 ml whipped cream (whipped cream)
120 ml sour cream (sour cream)
For the chocolate frosting:
80 g dark chocolate
50 ml of liquid cream