Mmmmsachertorte. I am told by a fine German woman that the cake is the critical part and it bakes a lot like a souffle. One layer. Ganache is a dark chocolate and hazelnut. You warm your jam and brush a glaze of it all over between the cake and the ganache.
I am scare to try this at home.
Cake:
1c flour
1/3c cocoa
1c caster sugar
100grams unsalted butter melted
4 eggs separated. Whites are soft peaked and folded in.