This recipe is an amalgam of research from Daring Bakers, Semi Swede, Martha Stewart, with my own pastry elements. It makes one large 9-inch cake. This is an intermediate baking project, which means you need to know the basics of making a successful sponge cake that has no chemical leavens. This recipe has been edited 2/19/23 for easier assembly. I believe it is now approachable for most home bakers. I've also added a video to the blog post for action assembly of this cake. I think it will be a helpful tool for beginners attempting this confection.