Wash, stalk and stone the cherries. Put 500 g flour in a bowl and press a depression into it. Warm milk lukewarm and pour into the hollow. Crumble the yeast into the milk, add sugar, 1/2 teaspoon salt, egg and 60 g butter and knead with the dough hooks of the hand mixer until the dough comes off the bowl rim. Cover and leave to rise in a warm place for about 45 minutes. For the crumbles, whisk 125 g butter, brown sugar and 1/2 teaspoon salt with the whisks of the hand mixer until creamy. Add 250 g flour and cinnamon to the butter-sugar mixture and rub with your hands to form crumbles.
Lightly knead the yeast dough on a floured work surface and roll out (approx. 32 x 39 cm). Place the yeast dough on a greased, floured fat pan of the oven (32 x 39 cm). Spread the yeast dough with sour cream, sprinkle with cherries and sprinkle with crumbles. Leave the cake to rise again for about 30 minutes in a warm place. Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for 40-45 minutes. Let the cake cool down on a cake rack. Whipped cream tastes good with it