Preheat oven to 350°F (175°C) and line two baking sheets with parchment paper.

In a bowl, mix all-purpose flour and powdered sugar.

In another bowl, cream together cold butter and granulated sugar until fluffy. Add egg yolk and vanilla extract.

Gradually combine dry ingredients with wet until a soft dough forms.

Wrap in plastic wrap and chill for at least one hour.

Roll out chilled dough to ¼ inch thick on a floured surface. Cut out shapes with cookie cutters, making half with center cutouts.

Bake for 10-12 minutes until edges are lightly golden.

Cool completely before spreading jam on solid cookies and topping with cut-out cookies.

Dust with powdered sugar before serving.