Despite their fancy shape, roulades (or rolled cakes) are easy enough for even beginner bakers to accomplish. That's due in large part to the way the jelly roll cake, which is called a sponge cake, is malleable enough after baking to be picked up and rolled up and otherwise manipulated, all without rips or tears. While it is still hot, spread the cake with the chocolate cream and then roll up into the log, placing the seam side down to help it hold the shape.