No. of servings: 50
Mince walnuts and mix them with flour, sugar, egg yolks and butter.
Cover the dough with foil and place it in the refrigerator for night.
Divide the rested dough into quarters and gradually process them. Dough is quite tough but it will soften up when you process it. Take a piece of dough and shape cylinder out of it with diameter about 3 cm. Slice it into one centimeter pieces.
Shape each part into a ball and use end of the wooden spoon to make a hole in the ball.
Place the cookies in the baking tin and bake in preheated oven at 355°F (180°C) (10-15 minutes).
Fill the cooled delicate cookies. Place about half teaspoon of the jam into each hole.