Cream butter, 40 g sugar and salt. Stir in the eggs one after the other. Mix flour, 1 teaspoon cinnamon and baking powder, alternating with the milk. Heat up the waffle iron and grease it lightly.
Bake 6 waffles one after the other from the dough. Drain the plums. Mix 50 g sugar and 1 pinch of cinnamon. Mix vanillin sugar and cream setting agent. Whip the cream until stiff, allow the cream firming mixture to trickle in.
Spread plum puree and 2/3 of the plums on the waffles. Add cream and spread. Roll up the waffles and sprinkle with cinnamon sugar. Serve with remaining plums. Decorate with cinnamon sticks.