Cut 175 g chocolate-peppermint bars into small pieces. Cut fat into pieces. Cream fat and sugar with the whisk of the hand mixer. Stir in eggs one by one. Mix flour and baking powder and stir in alternately with liqueur and milk. Finally fold in the mint pieces.
Spread the dough evenly on the greased, floured fat pan of the oven (32 x 39 cm). Bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for 25-35 minutes. Remove the cake from the oven and let it cool down on a cake rack. Whip the cream until stiff, allow vanilla sugar to trickle in and fill into a piping bag with a star-shaped spout. Cut chocolate-peppermint bars diagonally in half. Cut the cake into pieces and decorate with cream, mint bars and mint before serving
1 hour waiting time