This pierogi filling is made with prunes, which are nothing more than dried plums. Once the dumplings are boiled, they plump up and it's like eating a fresh plum.
Alternatively, the pierogi dough can be filled with powidla śliwkowe -- plum butter, which is similar to prune butter.
Sweet pierogi for dessert are common. They're usually served with melted butter and a dusting of granulated or confectioners' sugar.
Here is a larger photo of Polish Prune-Filled Pierogi.
Gather the ingredients.
Place whole prunes in a medium saucepan, cover with water to come 1 inch above prunes. Bring to a boil, add sugar, lemon juice, cinnamon, and cloves. Cover and turn off the heat. Let steep 15 minutes.
When cool enough to handle, drain, discard the cinnamon stick and remove pits from prunes. Let cool completely. Refrigerate until ready to use.
Drop tablespoons of filling in the center of each piece of dough of choice.
View these step-by-step instructions for making pierogi.
Serve and enjoy!