Mix flour with baking powder and sift into a mixing bowl.
Add the rest of the ingredients for the dough and use a hand mixer (dough hook) to mix everything into a dough first briefly on the lowest, then on the highest level, then shape into a roll. Roll out the dough on the baking sheet.
Covering:
Brush the dough with apricot jam. Melt the butter, sugar, vanilla sugar and water in a saucepan while stirring. Stir in the ground and grated hazelnuts. Let the mixture cool down a bit and distribute it evenly on the dough. Put the baking sheet in the oven.
Hot air: about 160 ° C
Baking time: about 25 minutes
Let the pastry cool on the baking sheet on a wire rack, then cut into squares, divide these diagonally to form triangles.
Molding:
Roughly chop the chocolate and melt it in a water bath over low heat. Dip the two pointed corners of the pastry into the icing and let them set.
For coconut corners:
Replace the 200 g of grated nuts with 200 g of desiccated coconut.