Preheat oven to 180°C and oil a baking pan (preferably a loaf pan).

Separate eggs and beat egg whites, with a pinch of salt, until stiff. Set aside.

In another bowl mix together butter and white sugar until very creamy (the longer you mix the better the batter will be). Add egg yolks one after another and vanilla extract until nicely incorporated.

Add flour, baking powder, chocolate chunks and hazelnuts - Do not overmix! At last add stiff egg whites. Pour batter into the baking pan.

Bake for about one hour or until a toothpick comes out clean.

Now, take a tablespoon and drizzle Rum over the cake. Then let it cool completely in the baking pan.