This is a favorite cake in Sweden. It's a simple, buttery cake filled with cinnamon-sugar apple slices. It reminds me of a pound cake, but with a yummy apple cinnamon topping. The presentation is made really pretty by arranging the apple slices. You can serve this as a coffee cake or as a dessert. You can re-heat slices in the microwave if you like it warmed. Recipe from Epicurious.