Beat the fat until foamy, add the sugar and vanilla sugar alternately with the eggs and stir until the sugar has melted. Stir in the sifted flour, mixed with baking powder, alternately with the egg liqueur.
Place the dough on the prepared baking sheet, smooth it out and cover with the well-drained peaches. Press the curved side of the peaches lightly into the dough, sprinkle with flaked almonds and bake immediately in the preheated oven at 200 ° C (convection 175 ° C) for 25-30 minutes.