Put butter, flour, cocoa, 75 g sugar, salt and nuts into a bowl and knead into crumbles, first with the dough hooks of the hand mixer, then with floured hands. Put the crumbles in a cool place.
Wash, stalk and stone the cherries. Caramelise 75 g sugar in a pan, add cherries and simmer at medium heat for 5-8 minutes. Press half of the crumble as a base into a greased springform pan (24 cm Ø).
First spread the crisps, then the rest of the crumbles on top. Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for 25-35 minutes. Remove and let cool off. Dust with icing sugar.