Steps

• Arrange the sifted flour on a work surface, add the diced butter, and rub the flour and butter between your hands to coat it.
  Add the sugar, a pinch of salt, and continue to work it with your hands
  Finally, add the egg yolks and quickly knead everything together.
  Form a dough ball, wrap it in plastic wrap, and refrigerate for at least half an hour before using.
  
  After resting, roll it to a thickness of about 1/4 inch on a lightly floured work surface.
  Cut two discs for each cookie using a cookie cutter with a diameter of 2 1/2 inches.
  For half of the cookies, use a smaller cookie cutter to form a ring.
  Place the cookies on a baking tray lined with parchment paper.
  Bake on a tray lined with parchment paper at 350°F for 15 minutes.
  Remove from the oven and let cool.
  Fill with jam or hazelnut cream and sprinkle with powdered sugar.