Wash and halve the apricots and remove the stone. Grease a square springform pan (24 x 24 cm). Mix cream cheese, sour cream, sugar, 2 eggs and starch to a smooth glaze.
Chop dark chocolate. Cut butter into pieces. Melt the chocolate and butter in a wide saucepan over low heat while stirring.
Beat 2 eggs, brown sugar and salt in a bowl with the whisk of the hand mixer for 3-4 minutes until creamy. Remove the chocolate-butter mixture from the heat, immediately pour into the egg mixture and stir in.
Mix flour, cocoa and baking powder. Quickly fold into the chocolate-egg mixture. Put the dough into the mould and smooth it down.
Place the apricots on the dough with the cut surface facing down. Carefully add the sour cream icing and smooth it down. Bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: see manufacturer) for 40-45 minutes.
Remove and let it cool down on a cake rack.
Chop light chocolate and melt it over a warm water bath. Mix the cornflakes and chocolate and spread on a baking tray lined with baking paper as a crumble. Place in a cool place and allow to dry.
Cut brownies into pieces and sprinkle with cornflakes crumbles.