To make your own version of the world's most expensive dessert, go to Costco and pick up a two-carat diamond, a squeezable bottle of champagne jelly (they sell an economy-sized version now), champagne caviar, bitter dark chocolate, orange, peach and whiskey-flavored Belgian chocolate, "a light biscuit joconde" (not this kind of joconde but this kind), a gold ring, some pink things, and several sheets of gold leaf.