Recipe:
Wheat flour 350 grams (2.7 cups) cup size 250 ml
Butter 100 grams (7 tablespoons)
Baking powder 1/2 teaspoon
Cornstarch 2 heaping tablespoons
some salt
Sour cream or yogurt 100 grams (5 heaped tablespoons)
Egg 1 piece
Sugar 2 tablespoons
vanillin 1/3 teaspoon

Let the dough rest for 10 minutes
Divide the dough into 10 parts

Filling:
Walnuts 200 grams (1.3 cups unchopped)
Sugar 100 grams (8 level tablespoons)
Egg white 1 pc

Hazelnuts for decoration
Sprinkle with powdered sugar

Bake at 180℃ for 30 minutes

You can pour syrup over it
Syrup:
Syrup: 3 tablespoons honey and 5 tablespoons warm water
Syrup: Boil 3 heaped tablespoons of cane sugar and 3 tablespoons of water until soluble

Bon appetit, my dear friends!