Chocolatecake / Sachertorte

I found this recipe on actilingua.com

Ingredients for 12 people

Batter:

* 130 grams (4.59 ounces) butter
* 130 grams (4.59 ounces) dark chocolate
* 100 grams (3.53 ounces) powdered sugar
* 6 eggs
* 80 grams (2.82 ounces) white sugar
* 130 grams (4.59 ounces) flour
* apricot marmalade

Icing:

* 150 grams (5.29 ounces) chocolate
* 75 grams (2.65 ounces) coconut shortening

Batter:
Preheat the oven to 180-200°C.
Melt chocolate and butter in a double boiler over hot water (Bain Marie, "im Wasserbad"). If you do not have a double boiler you can also use a normal pan filled with water and with a smaller pan in it. Remove from heat and let the mass cool.
Add the powdered sugar and the egg yolks little by little while carefully stirring.
Beat the egg whites and add the white sugar. Mix into the batter and add the flour gradually while constantly stirring.
Pour batter into a greased spring form pan. Bake at 165°C for 50 to 60 minutes.
Allow the cake to cool completely before removing from pan and before icing.
Once cool remove the cake from pan then slice horizontally. Insert a filling of pureed jam between the layers.

Icing:
Melt chocolate and coconut shortening in a double boiler over hot water and cover the top and sides of the cake with the warm (not hot) icing.