Created by Dreamer_in_Ontario on October 7, 2011
Step 1: Preheat oven to 350 Fahrenheit
Step 2: Grease baking sheet or line with parchment paper.
Step 3: Sift flour into a large bowl and make a well in the centre.
Step 4: Add sugar, vanilla sugar and egg yolks to well
Step 5: Mix a small amount of flour into the ingredients in the well to make a thick paste.
Step 6: Cut cold butter into small pieces over the flour mixture
Step 7: Working quickly and starting from the centre, work all the ingredients together to make a smooth dough.
Step 8: Chill dough for 1/2 hour.
Step 9: Roll out dough on a lightly floured surface to a 1/8 inch thickness (3 mm).
Step 10: Cut into 2 inch rounds (5 cm).
Step 11: Cut 3 small holes using a floured thimble, in half of the cut out rounds, or use a smaller cookie cutter to cut a hole in the centre (you can use linzer cookie cutters if you have them).
Step 12: Place on prepared baking and bake on middle rack of oven for 10 to 12 minutes or until light golden brown.
Step 13: Cool cookies.
Step 14: Spread jam on the solid rounds and cover with the cut out rounds.
Step 15: Dust with the icing sugar while the cookies are still warm (easiest way is to dip cut out cookie into icing sugar before placing on top of jam layer.