How to cook
Distribute the mixture evenly into 3 containers. Bake these cake layers in a preheated 356°F (180 °C) oven about 20-25 min. Leave them to cool well.
In the meantime, beat the Nutella and sour cream with a mixer until you get a homogeneous mixture.
Repeat this process with the other cake layers. At the very top, decorate as desired, use your imagination. Stick wafer rolls along the sides.
It's best to leave the cake in the fridge overnight - that way it becomes even tastier.