Separate eggs. To beat snow. Mix the yolks with the sugar + vanilla sugar until frothy. Stir in the oil. Stir in the remaining ingredients. Finally fold in the snow slightly.
Pour the dough into a greased, floured Guglhupf pan (box or wreath form) and bake at 180 ° (160 ° hot air) for about 45 minutes.
Cover the cooled hupf with orange glaze (mix icing sugar with orange juice and orange liqueur).