Grease a baking tray, dust with flour. Drain the apricots and cut them into small pieces. Melt 500 g butter. Mix 750 g flour, sugar, vanilla sugar and 1 pinch of salt. Pour in more hot butter.
Roughly knead into crumbles with the dough hooks of the mixer. Preheat oven (electric cooker: 200 °C/circulating air: 175 °C/gas: see manufacturer).
Scarcely 2⁄3 Spread the crumbled dough on the tray and press it on. Sprinkle 1 tablespoon of flour over the rest of the dough and tilt the bowl so that the crumbles do not stick together. Spread the jam on the dough base.
Spread the apricots on top. Sprinkle with the remaining crumbles. Bake in a hot oven for 35-45 minutes. Whipped cream tastes good with it.