Mix the pudding powder with 6 tbsp. sugar and stir with 100 ml milk until smooth. Boil 300 ml milk in a pot. Stir the pudding powder into the boiling milk, bring to the boil and simmer for about 1 minute.
Take it off the stove. Stir in the mascarpone. Pour into a bowl, cover directly on the surface with foil and allow to cool.
In the meantime, wash the plums, cut them in half and stone them. Caramelise 120 g sugar in a pan until golden brown. Add the plums and stew for 5-7 minutes at medium heat, turning them over. Remove the fruit from the heat and let it cool down.
Stir the pudding until smooth. Place caramelized plums, pudding cream and crunchy flakes alternately in a glass bowl and chill until serving.