Preheat the oven to 200 ° C.
To melt the butter.
Mix with the sugar.
Add the 3 eggs and mix.
Pour in the almond powder and baking powder. Mix.
Gradually add the flour, stirring regularly.
Pour in the milk and mix.
Butter a baking dish and pour the mixture into it.
Slice the plum. Remove seed.
Add the plums or italian prunes.
Bake for 50 minutes.
Remove from the oven and sprinkle icing sugar on top of the cake.
Leave the cake cool at room temperature
Slice and serve !