Tiroler Nusskuchen

2 sticks   butter/200g Butter
9oz        sugar/250g Zucker
6          eggs separated/6 Eier getrennt
9oz        hazelnuts/250g Haseknuesse 
7oz        chocolate finely chopped/200g Schololade fein gehackt 
4 1/2oz    flour/ 125g Mehl 
1 tsp      baking powder/1 Teeloefel Backpulver 
1tsp       cinnamon/ 1Teelofel Zimt 
Apricot marmalade/ Aprikosen Marmelade 
Chocolate glaze/ Schokoladen Glasur 

Beat butter, sugar and egg yolk until creamy. 
Blend sifted flour and baking powder and Cinnamon with nuts and chocolate. Incorporate into butter mixture. 
Beat egg whites to a stiff peak then gently blend into batter. 
Put into well-greased cake pan of your choice. 
Bake in preheated 350 degree preheated oven for 30 minutes. 
Test for doneness before removing from oven. 
May spread apricot marmalade over warm cake. 
When cooled cover with chocolate glaze.