How to make
Grind the biscuits to flour and mix them with the melted butter. Distribute the mixture in the bottom of a form and leave it in the fridge.
To the beaten cream cheese, add the sugar, vanilla and the sour cream that's been beaten with the powdered sugar. Beat all of the ingredients together until you get a homogeneous mixture.
Cover the cooled layer with the cream and put it back in the fridge. Smear the cake with the jam. Then leave it in the fridge overnight.