Put the oil, amaretto, egg yolk, sugar and vanilla sugar in a bowl and stir together. Sift flour with baking powder and mix in. Beat the egg whites and fold in.
Grease a Guglhupfform, sprinkle with breadcrumbs and pour in the batter.
Bake in the preheated oven at 200 ° C on the middle rack for about 45 to 50 minutes.