Mix the flour, sugar, butter, salt, vanilla sugar and add the egg. Knead into the dough and wrap in cling film and leave to rest in the refrigerator for approx. 1 hour.
Mix the remaining ingredients in the food processor (preferably one with a knife insert, gives a nice, smooth mixture).
Roll out the shortcrust pastry thinly and cut out a base the size of a springform pan, shape the remaining dough into a roll, place it along the edge of the springform pan and create an approx. 1 cm high rim. Prick the dough several times with a fork, cover with baking paper and sprinkle with lentils or similar. complain. Pre-bake for 10 minutes at 200 ° C. Take out and let cool down for 3 minutes. Remove the baking paper with the lentils (the lentils can be used again!). Then pour the marzipan mixture onto the dough and place in the oven again at 200 ° C for approx. 20-25 minutes. Dust with powdered sugar.