How to cook
Mix the softened butter with the sugar. Melt the milk chocolate in a water bath, cool a little and mix with 4/5 cup (200 g) butter.
Crush the hazelnuts and combine them with the coarsely crumbled biscuits. Pour on the chocolate, mix everything and put it in a cake form with baking paper.
Leave it for 20 min. in the refrigerator. Melt the natural chocolate in a water bath, remove it from the stove, add the butter and pour this mixture over the cake.