How to cook
Cut the butter into pieces in a plastic bowl. Add the sifted flour, 2 vanillas, the sugar and the 2 egg yolks. Knead a shortbread dough, roll it out into a sheet with a thickness of 3/16″ (0.5 cm).
Cut out sweets using shapes and bake in the oven for 15 minutes. After cooking, stick them 2 by 2 with marmalade.
Optionally, you can sprinkle them with powdered sugar.