Costco sheet cakes have developed something of ... fill out a "Special Cake Order Form," and note your ask to score the cake. Drop the form in the order slot and you're done.
If you were to set your half-sheet cake on a scale, the number would read about nine-and-a-half pounds. According to Costco's order form, two of those pounds are the cake's mousse filling. 4. There ...
It's a great solution if you dropped the ball and need something customized in a pinch. But that only applies to Costco's round cakes. The large sheet cakes are a different story.