First prepare the dough.
For this, mix the flour with the baking powder, sift cocoa and add. Stir in the sugar, butter and eggs and knead the mixture well.
Butter and flour a baking tray well and spread 3/4 of the dough evenly in it.
Set aside the other quarter of the dough.
Preheat the oven to 180 °C.
In the meantime, prepare the filling for the Russian pluck cake.
Beat the butter until fluffy. Add the sugar, curd, whipped cream, eggs, vanilla sugar and a pinch of salt and mix well. Spread the curd filling on the bottom of the dough in the mold.
Now take the set aside dough to hand and form small “plucks” out of it. Gently press the dough blobs into the curd filling, creating a pretty pattern on the cake.
Bake the cake in the oven at 180 °C for 40-45 minutes.
Cover the cake with aluminum foil after about 20 minutes to prevent the curd from darkening too quickly.