For the batter, beat the butter, sugar and vanilla sugar until frothy. Mix in the eggs one by one. Mix the flour with the baking powder and cinnamon and fold in.
Fold in the nuts and grated apple and pour the dough into a greased and crumbled wreath dish.
Spread smooth and bake at 170 ° for about 70 minutes. (Make chopsticks test)
A lemon or rum icing tastes very good on the wreath and keeps it fresh and juicy.