Beat the butter airy and white with the sugar and the vanilla energy. (is possible with beater or mixer)
Stir in alternately half of the protein and flour and beat firmly under each other.
Add the rest of the egg whites and the flour and continue to a homogeneous mass.
Put in piping bag with toothed nozzle, lined baking sheet with baking paper, spray a dough on the paper, place a stick on top and spray a mustache on it, continue with the rest of the dough.
Bake for 15 minutes at 190 °.
Allow to cool and stick through the melted chocolate, if necessary, decorate with sprinkles.
Put in the fridge so that the chocolate can set.