Stir 5 tablespoons of milk, 50 g sugar and pudding powder until smooth. Bring 400 ml milk to the boil in a saucepan, stir in the pudding powder, bring to the boil again while stirring and simmer for 1 minute on a low heat. Pour into a bowl, place foil directly on the surface. Beat fat, salt, vanilla sugar and 250 g sugar with the whisk of the hand mixer until foamy. Stir in the eggs one by one. Mix flour and baking powder and stir in portions. Pour the dough onto a baking tray lined with baking paper and smooth it down.
Stir the pudding again. Spread the pudding and plum puree with a tablespoon in patches on the dough. Sprinkle with almonds. Bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for 30-35 minutes. Remove from the oven, place on a rack and allow to cool. Dust with icing sugar. Whipped cream tastes good with it