A delicious spongy confection sandwiched between an incredibly sugary and fattening frosting, or an incredibly sugary and fattening frosting sandwiched between a delicious spongy confection.
In this case, the term does not refer to a confection at all, but rather to a secret project with many layers. Kind of like an onion, but much more and much less tasty and/or sweet.
The following 40 pages are in this category, out of 40 total.