I know I have read some ideas on here somewhere about how to make a sheet cake that is half white and half black. I only need a 9x13 size. Any suggestions on how to achieve this simply?

THanks in advance for your expertise!

It is acutally a pretty simple process.
Mix one bowl of white cake and then another bowl of chocolate.
Grease and butter your sheet cake pan.
Then at the same time pour in your mixes. They will meet in the middle and 1/2 will be one flavor and 1/2 will be the other.

Wow, that does sound easy. I actually thought about that, but wasn't sure if they would get mixed together or not. I wonder if it would help to hold a piece of cardboard in the middle until it's poured, and then pull it straight up and out?

I have been planning on doing this as well. Someone suggested holding a sheet of cardboard, pouring and taking the cardboard out. I was making mine angled, so that's why that would work best. It will probably make it more accurate too. i don't know if I'm coordinated enough to just pour at the same time. LOL

I place another pan under one end of the sheet pan so it is raised up at an angle. Then pour one color batter on the lowest end. then take the pan out from under the other end and pour the other batter on that side. It dosen't seem to be a problem with the batters running where I don't want them. And both batters bake together just the same as if it was one type of batter. I do notice that the chocolate side will rise higher than the white side, but I just trim it down before I ice it, and it's never a problem.

Probably 2/3 of all the cakes I do are a combination of two flavors. Customers love the option of having two flavors.