Gypsy's Arm Cake Roll (Swiss Roll) vs Gugelhupf (Bundt Cake)

Both cakes lean on eggs, sugar, butter, milk and lemon zest, yet they put them to very different work. The Gypsy's Arm Cake Roll whips eggs and sugar into an airy foam for a thin, springy sponge, rolled while warm, while milk, yolks and butter go into a cinnamon-scented pastry cream thickened with cornstarch, with jam as an alternative filling. The Gugelhupf creams generous butter with sugar, adds milk and baking powder, and folds in raisins and slivered almonds for a tall, dense, fruit-studded crumb.