Mix the flour, sugar, oil, mineral water, eggs and baking powder with the hand mixer to a smooth dough. Place the dough on a greased baking sheet and bake at 175 ° C for about 20 minutes (fan-assisted). Let the finished dough cool down a little. Cook the vanilla pudding according to the instructions on the packet and pour onto the batter. Put the desiccated coconut, sugar and butter in a small saucepan and let it become smooth on a low heat. Pour the mixture onto the pudding, which has not yet cooled completely.