Step 1: Make the Dough : In a large bowl, beat together softened cream cheese and butter until smooth. Add vanilla and a pinch of salt. Gradually mix in flour until a soft dough forms. Avoid overworking.

Step 2: Chill the Dough : Wrap the dough in plastic wrap and refrigerate for at least 1 hour. Chilling makes it easier to handle.

Step 3: Preheat Oven and Prepare Baking Sheet : Preheat oven to 350°F (175°C). Line a baking sheet with parchment paper.

Step 4: Roll Out the Dough : On a lightly floured surface, roll out the dough to about ¼ inch thickness.

Step 5: Cut the Dough : Cut the dough into 2½-inch squares.

Step 6: Add Filling : Place about ½ teaspoon of jam in the center of each square. If desired, sprinkle a little lemon zest over the jam.

Step 7: Fold the Cookies : Fold two opposite corners of each square toward the center over the jam, slightly overlapping. Gently press to seal.

Step 8: Bake : Place cookies on the prepared baking sheet, leaving space between them. Bake for 15–18 minutes, or until the edges are lightly golden.

Step 9: Cool : Allow cookies to cool on the baking sheet for 5 minutes, then transfer to a wire rack to cool completely.

Step 10: Dust with Sugar : Once fully cooled, dust with powdered sugar.