Mix the butter with icing sugar until frothy. Mix in the vanilla sugar, amaretto and egg yolks well. Wrap the quark in a cloth and squeeze out vigorously. Mix well with the mixture, add flour and carefully fold in the beaten egg white.
Grease 4 heat-resistant soup plates well with butter and fill them with the mixture to equal parts. Place the pitted and halved apricots on top and bake in the oven at 180 ° C for about 12 minutes.
Remove, sprinkle with powdered sugar, put a scoop of ice cream in the center and serve quickly.