Preheat your oven to 180°C (350°F). Grease and butter a baking pan to prevent the cake from sticking.
Prepare the dough: In a mixing bowl, cream together the soft butter and sugar until light and fluffy. You want a lovely, airy texture!
Add the egg: Beat in the egg until well incorporated.
Combine dry ingredients: In another bowl, whisk together the flour, baking powder, baking cocoa, and salt.
Mix it all together: Gradually add the flour mixture to the butter mixture, mixing until just combined. Don’t overmix; a little lumpiness is okay!
Set aside: Take about one third of the dough and set it aside to make the streusel topping later.
Assemble the cake: Press the remaining dough evenly into the bottom of the prepared baking pan, creating a base.
Add cherries: Spread the drained morello cherries over the dough, ensuring they’re evenly distributed for that fruity flavor punch.
Create the topping: Crumble the reserved dough over the cherries to create a streusel topping.
Bake: Place the pan in the preheated oven and bake for about 30-35 minutes. You’ll know it’s done when a toothpick inserted in the center comes out clean.
Cool and serve: Allow the cake to cool before slicing and serving to enjoy your lovely creation!