How to cook
Smear a round cake form (with removable walls is fine) with butter. Crumble the biscuits and arrange 1/2 of them in the form to make a layer.
Mix the sour cream with the remaining 1 cup sugar and smear the apple mixture. Arrange another biscuit later, apples and cream.
For decoration, use whole and ground walnuts. You can also add different bonbons. Leave it in the fridge for 24 hours.