Preheat oven (electric cooker: 175 °C/circulating air: 150 °C/gas: see manufacturer). Oil a fat pan (approx. 32 x 39 cm; deep baking tray). Drain the cherries in a sieve, collecting the juice.
Chopping chocolate. Mix flour, sugar, 100 g cocoa, vanilla sugar, baking soda and baking powder. Mix soy drink, 1⁄4 l oil, syrup and 200 ml cherry juice. Stir into the flour mixture with the whisks of the mixer.
Fold in cherries and chocolate.
Smooth the dough on the baking tray and bake in a hot oven for about 30 minutes (the dough should still be slightly moist). Take out and let it cool down.
Cut the cake into cubes of about 4 cm. Dust with cocoa. Whipped whipped cream (e.g. from Soyatoo) tastes good with it.