Beat the butter, sugar and yolks until frothy, mix the baking powder with the flour and mix in alternately with the milk. Now grease a tray, dust with flour, distribute the dough evenly on top, cover with the pitted, halved apricots and bake at 200 ° C for 30 minutes until golden. Now beat the egg white until stiff, let the granulated sugar and vanilla sugar trickle in and continue beating. Spread this meringue on the cake, bake for another 20 minutes at 170 ° C until light yellow and let it cool in the oven.