In a saucepan, pour the sugar and flour and mix well.
Then add a pinch of salt and two eggs, and beat until smooth.
Gradually add sour cream and put the saucepan on the stove. Cook the cream over medium heat until thick.
Then add the butter and vanilla sugar and leave to cool to room temperature.
Chop the chocolate cookies in a blender or rolling pin. Pour into a bowl and add the melted butter and milk.
Visually divide the crumb into three parts. 1/3 set aside for topping.
We collect sour cream. Put 1/3 of the crumbs on the bottom, flatten and seal. Next, distribute another 1\3 crumbs on the sides (use a spoon to make the sides 4 cm high).
Put all the cream inside the mold.
Sprinkle the remaining 1\3 crumbs on top of the cake. Leave to stabilize in the refrigerator for 5-6 hours. Bon Appetit!