egg youlks and beat till thick. Cream butter and sugar. Put these into large bowl, add yeast disolved w/ 1 tablespoon sugar and nix thoroughly. Add rum then flour and cream alternately and beat hard till dough blisters. Set in warm place to rise. Punch down and let rise again. Place dough on floured surface and stretch and fill w/ pitted prunes. Fold over and cut into desired size balls. Place on floured surface and let rise. Fry in deep hot oil turning once. Paczki should be verry dark color before turning to ensure that they are thoroughly baked. Drain on soft absorbent paper. Sprinkle w/ powdered sugar.