Anonymous wrote:

Anonymous wrote:OP here. Thanks all. I've gotten my courage up and I'm going to do a SINGLE layer half sheet cake, 18"x13". Looking at the pan in person, one layer should be good. I think I'm going to do a Betty Crocker whiter vanilla box mix and add store bought sprinkles to make a funfetti cake. Decorations TBD, but knowing the kid in question, probably more sprinkles!

Sounds fun! How many boxes of cake mix for a pan that size? 2 or 3?