AHello, I am a first time baker. I am making a birthday cake for my 15 and 17 year (their birthday is tomorrow. How many eggs do I need for a half sheet cake. I bought 3boxes of cake mix already.

AHow many eggs does the box say to use?

AEach box says 3...I immediately thought use all nine...but that seems like a lot to me...

AThere is a reason that each recipe uses 3 eggs. Follow the recipe & use what is directed.