It is usually flavored with cinnamon and served with vanilla It is usually flavored with cinnamon and served with vanilla custard or ice cream. There is also a very popular version called äppelkaka (apple cake), which differs from the pie in that it is a sponge cake baked with fresh apple pieces in it. It is usually flavored with cinnamon and served with vanilla custard or ice cream. There is also a very popular version called äppelkaka (apple cake), which differs from the pie in that it is a sponge cake baked with fresh apple pieces in it. or ice cream. There is also a very popular version called äppelkaka (apple cake), which differs from the pie in that it is a spong.