Tender Polish Kolaczki cookies, made with browned butter, citrus-cardamom dough, plum and persimmon butter filling, and finished with raw sugar and toasted hazelnuts.
Place 1 cup butter in a light-colored saucepan. Melt over medium heat, stirring occasionally
Once melted, it will foam and bubble. Keep stirring and watch carefully. The butter will change from yellow to golden to amber brown, developing a nutty aroma (about 5-7 minutes total).
Immediately transfer to a heatproof bowl to stop cooking. Let it cool to room temperature, then refrigerate until solidified (about 2-3 hours, or 30 minutes in the freezer).
Once solid, it should have a softened consistency like regular softened butter.
In a large bowl, beat the re-solidified browned butter and 8 oz cream cheese together until smooth and fluffy, about 2-3 minutes.
Add 1 teaspoon orange zest and 1 tsp vanilla extract; mix until well combined.
Gradually add 2 ¼ cups all-purpose flour, Pinch salt, and ½ teaspoon ground cardamom mixing on low speed until just incorporated.
Dough will be soft and a little sticky. Divide the dough into two discs and wrap them in plastic wrap.
Refrigerate for a minimum of 2 hours, or overnight—this step is essential!
Preheat the oven to 350°F (175°C).
Line two baking sheets with parchment paper.
Lightly beat the 1 egg white in a small bowl.
Have your filling(s) ready and at room temperature.
Mix raw sugar with 2 tablespoons crushed and toasted hazelnuts.
Work with one dough disc at a time (keep the other refrigerated)
On a well-floured surface, roll the dough to about ⅛-inch thickness.
Cut into 2-inch squares using a knife, pizza cutter, or square cookie cutter.
Place the squares on the prepared baking sheet, about 1 inch apart.
Place about ½ teaspoon of Plum Butter or Persimmon Butter in the center of each square. Don't overfill, less is more here!
Fold two opposite corners toward the center, overlapping slightly. Gently press the corners together.
Lightly brush the folded corners with egg white. Pinch to seal, as egg white acts as glue.
Lightly brush the remaining egg white over the folded portions.
Sprinkle with raw sugar or nut mixture (or plain raw sugar).
Bake for 12-15 minutes until the edges just start to turn golden. The bottoms will brown slightly; that's perfect.
Don't overbake; they keep cooking on the pan after you take them out of the oven.
Let cool on the baking sheet for 5 minutes. Transfer to a wire rack to cool completely.
Once fully cooled, dust generously with powdered sugar
Notes
Chill the dough long enough - Cold dough = clean cuts + neat folds.Roll it thin… but not too thin - about ⅛ inch is the sweet spot. Too thick and they puff like little pillows; too thin and they crack when folded.Don’t overfill - kolaczki are delicate, a ½ teaspoon is plenty.