Mix sugar, vanilla sugar and fat in flakes. Season with salt and aniseed. Stir in the egg. Mix flour with baking powder, stir with milk.
Pour the dough into a piping bag with a large perforated nozzle. Sprinkle about 50 walnut-sized dots onto two baking sheets lined with baking paper. Cover half of the biscuits with almonds, the other half with hazelnuts.
Sheet metal in a preheated oven at 175 degrees (convection 150 degrees) approx. Bake for 15 minutes. Cool on a wire rack. Dust with powdered sugar.