Work the dough ingredients into a ball and put in fridge for 1/2 hour.
All filling ingredients to be mixed with just enough milk, so that you have a firm but spreadable consistency.
Then roll out the dough (from the fridge), very thin, and cut it in approx. 2-1/2"-3" squares. Place filling on each square and close up the dough around it [ you can make little rolls or pockets, etc.).
Place on a greased sheet and bake at 350 degrees about 25 minutes until light brown.
Immediately roll in confectioner's sugar (which you can mix beforehand with 2 little pouches of vanillin sugar).
The hazelnuts can be substituted with almonds or other ground nuts.
