Sophie and Katherine build a working slot machine for a casino-themed surprise 40th birthday party, while Andres fills an order for every flavor cupcake the shop ever made. But when the girls are pulled over during delivery, the surprise is on them.

It's Mommy and Daddy's 40th wedding anniversary, and Sophie and Katherine are throwing them a surprise party, complete with a portrait of the happy couple in cupcakes. Meanwhile, Andres has ideas of creating his own cupcake.

Sophie and Katherine push themselves to the limit creating a cupcake wedding dress for DC Fashion Week. But after learning their dress has to not only look chic but walk down the runway on a model, have the girls bitten off more than they can chew?