Mix sifted flour with yeast. Warm milk with 80 g butter and mix with powdered sugar, salt, eggs and rum. Add the flour and use the food processor or wooden spoon to work everything into a smooth dough until it separates from the edge of the bowl. Cover and let rise in a warm place for about 30 minutes, the volume should double.
Cut off small pieces from the dough, flatten it a little, fill with jam and seal. Put in a buttered dish, brush with butter and let rise again.
Bake in the preheated oven at 180 ° C for about 25 minutes until golden brown. Dust with icing sugar and enjoy a little cooled.