In a medium bowl, whisk together the flour and salt. Set aside.

In a large mixing bowl, cream together the softened butter and cream cheese until smooth and well combined.

Gradually add the powdered sugar and vanilla extract to the butter and cream cheese mixture. Mix until fully incorporated.

Slowly add the flour mixture to the wet ingredients, mixing until a soft dough forms. Divide the dough into two equal portions and wrap each portion in plastic wrap. Refrigerate for at least 1 hour or until firm.

Take one portion of the dough out of the refrigerator. On a lightly floured surface, roll out the dough to about 1/8 inch thickness.

Use a cookie cutter or a glass to cut out rounds or squares from the rolled-out dough. Place the cut-out dough pieces on the prepared baking sheets, leaving a little space between each one.

Spoon a small amount (about 1/2 teaspoon) of fruit preserves or pie filling into the center of each piece of dough.

Fold the corners or edges of the dough over the filling, pinching them together to create a triangle, square, or other shape. Repeat with the remaining dough and filling.

Bake the cookies in the preheated oven for about 12-15 minutes, or until the edges are lightly golden.

Remove the cookies from the oven and let them cool on the baking sheets for a few minutes. Then transfer them to a wire rack to cool completely.

Once the cookies are completely cooled, dust them with powdered sugar.

Repeat the process with the remaining portion of dough and filling.

Serve the Polish Kolaczki Christmas cookies and enjoy!