Warm up the milk. Mix 250 g flour, yeast, 36 g sweetness and 1 pinch of salt. Add 25 g fat and the warm milk. Knead everything with the dough hooks of the hand mixer. Cover the dough and let it rise in a warm place for about 40 minutes
Cut the plums in half. Grease a springform pan (26 cm Ø). Knead the dough again and roll out on the bottom of the mould. Place the rim of the mould around it. Cover bottom with plums. Leave to rise for another 10 minutes.
First knead 150 g flour, 36 g sweetness, 100 g fat, cinnamon and 1 pinch of salt briefly with the dough hooks of the hand mixer, then work into crumbles with your hands. Spread over the plums
Bake in the preheated oven (electric range: 200 °C/circulating air: 175 °C/gas: level 3) for 40-50 minutes. Let them cool down. Serve with: whipped cream
Out of season you can bake the crumble cake with 1 1/2 jars (720 ml each) of plums or other fruits (for diabetics) instead of fresh ones. It is also faster