Polish Cream Cheese Cookies (Kolaczki or Kolacky) 
Flaky, buttery, and filled with jam. 
Ingredients 
8 oz (220g) cream cheese
8 oz (220g) butter, at room temperature
1/2 tsp vanilla extract
2 1/2 cup (320g) all-purpose flour
2 T sugar
1/4 t salt
About 1/2 cup fruit jam of your choice
Confectioners' sugar for dusting 
Instructions 

1. In a large bowl, beat together cream cheese and butter using an electric mixer until smooth. Add vanilla extract. Mix flour with salt and sugar. Gradually beat in the flour until you get a soft and sticky dough. Divide the dough into three parts and wrap each in plastic wrap. Refrigerate for at least one hour or up to 1 day. 
2. Preheat the oven to 350°F (175°C). Work with one dough part at a time keeping the remaining dough refrigerated. Dust your working surface with flour and roll out the dough very thin, less than 1/8" (3mm). Cut into 2-inch (5 cm) squares. 
3. Place a heaping 1/4 teaspoon of the filling in the center of each square. Moisten opposite corners of the square with water and overlap them to the center, gently pushing the dough down to the filling. Repeat with all the dough. 
4. Bake for 12-15 minutes or until lightly brown. Transfer to wire rack and dust with confectioners' sugar while still warm.