Preheat your oven to 180° C - 360° F (fan oven).
Sift the flour in a large bowl and then add the egg, egg white, softened butter, icing sugar, semolina, vanilla paste, and baking powder.
Mix well using your hands until you have a nice and smooth dough.
Divide the dough into 24 equal pieces and turn them into balls.
Lightly flatten the dough balls and place them on a baking tray leaving enough space between each as they will rise when cooked.
Lightly press in the middle of the cookies with your fingertip and place a piece of hazelnut on each cookie.
Eggwash the cookies with a pastry brush and place the baking tray in preheated oven.
Bake them for 20- 25 minutes or until they are golden brown.
Let the cookies cool down for 5 minutes and then pour the syrup on with a ladle.
Cover the tray with a lid or cling film and let the cookies absorb the syrup and turn soft and moist, almost like a cake consistency.