Mix all-purpose flour, powdered sugar, unsalted butter, eggs, vanilla extract, and milk in a large mixing bowl until a smooth dough forms. Cover with plastic wrap and refrigerate for at least 30 minutes.

In a separate bowl, combine your choice of chopped nuts with any optional ingredients like raisins or chopped dates. Mix well and set aside.

Preheat your oven to 350°F (175°C) and roll out the chilled dough into a rectangle approximately 1/8-inch thick on a floured surface.

Sprinkle the nut mixture evenly over the rolled-out dough and press down lightly.

Tightly roll the dough into a log shape, pinch the seam together, and slice into 1-inch pieces.

Place the sliced cookies on a baking sheet lined with parchment paper and bake for 15-20 minutes until golden brown.

Allow the cookies to cool on the baking sheet for 10 minutes, then transfer to a wire rack. Dust lightly with powdered sugar before serving.