Mix the egg yolks with the flour, baking powder, vanilla sugar and sugar until crumbly. Gradually add the melted butter to the dough. Beat the egg whites very stiff and fold into the batter. Spread the dough on a non-greased (!) Drip pan.
Drain the mandarins while collecting the juice. Spread the tangerines on the dough. Bake the cake at 160 ° C for 25-30 minutes until golden. Drizzle about half of the juice onto the warm cake.