Finally. Sorry for the delay. Here is a KP-friendly recipe for sacher torte. We make it this way all year round.
Melt together in the microwave (for about 4 minutes):
16 dkg ground walnuts
16 dkg sugar
10 dkg dark chocolate
2 dl water
After it's cool, add six egg yolks. Whip the six egg whites separately with a bit of sugar. Once whipped add two tablespoons breadcrumbs/matzoh meal then add to the other mix.
Bake for 45 minutes on 180 C.
Once cool add a layer of preserves (raspberry or apricot) and the chocolate icing on top:
15 TBSP sugar
5 dkg butter or margarine
4 TBSP water
3 TBSP cocoa powder
Melt together and once solidified spread onto the cake. Cover with plastic wrap held up by toothpicks.
I've attached a pic of our latest creation!
You mean something beyond the heart-stopping feeling when you split the cake in two horizontally, lift off the top layer, and flip the bottom layer?
I really like the apricot/chocolate combination. I made sure to get preserves made with cane sugar (I think corn syrup gives preserves and off taste), whisked it in the blender for smoothness, and cooked it down for easier spreading. I spread apricot over the bottom, sides and top. then the chocolate frosting. (mine didn't look as perfectly even as the ones in the shop windows of Vienna)
The cake you suggested was a good idea, I think ground nut (I used hazelnut) flour gives a richness to layer cake that wheat flour cakes can lack.
This cake was for a Shabbos birthday, and one of the guests brought something I had not seen before: little pinwheels on toothpicks. When they sing Happy Birthday, you blow and the pinwheels spin. Very festive.