Beat the top 6 ingredients with the mixer and add the flour mixed with baking powder.
Knead everything into a dumpling and place on a greased baking sheet.
Spread the dough out on the baking sheet with your hands, flatten it evenly and pull up a small edge. Flour your hands lightly if the dough sticks! Pierce with the fork.
Place the plums on the dough with the core side up, sprinkle with the cinnamon sugar and top with the crumbled amarettinis.
Preheat the stove to 180 ° C and bake the cake for 25-30 minutes. Chopsticks and visual test!