The behemoth Mocha Crunch Bar Cake may well go down in history as one of Costco's biggest desserts. The cake, which shares a lot of similarities with its iconic Tuxedo Cake, is currently available at select retailers nationwide. It features a chocolate cake base that is smothered with alternating layers of mocha-flavored mousse, a mocha crunch layer, cappuccino mousse topping, and is garnished with a dark chocolate swirl and white chocolate shavings. I have had the good fortune of sampling Costco's Tuxedo Cake for a previous ranking of the brands best chocolate desserts, and it scored high marks, so I was eager to give this cake a try. Read on to discover if you should add this cake to your next Costco grocery list.