Sift the flour and baking powder, knead with sugar, vanilla sugar, egg and butter to a smooth dough. Put it in a cold place. Cut out cookies. Put them on a baking tray covered with baking paper and bake: Preheat the oven for about 10-13 minutes at 160° convection.
Dissolve the dark chocolate coating in a water bath at low temperature. Pour into freezer bags, cut off very small corners and decorate cooled cookies.
Stir the raspberry jelly until smooth (possibly pass through a sieve). Divide the giottos with a very sharp knife. Put a blob of jelly in the middle of each cookie and place one half of a Giotto ball on top.