Decadence D'Or is a $750 cupcake available at the Palazzo in Las Vegas, making it the most expensive cupcake available out there. This cupcake is made out of Palmira Single Estate chocolate, which was developed by Valrhona, the French luxury chocolatier. While the frosting is made with Charentes-Poitou AOC butter from an established French butter cooperative, and contains Tahitian Gold vanilla caviar which is hand-pollinated and harvested. Topped up with a little Louis XIII de Remy Martin Cognac, this cupcake is molded into a hand-blown fleur-de-lis. Edible gold leaves add more luxury to this treat. You have to order this cupcake 48 hours in advance. Do you think I can apply my sandwich technique to this cupcake?