I need to make a sheet cake that is 1/2 vanilla & 1/2 chocolate. How do I do this while making them in the same pan? I want them side by side? Can I just put in a "divider" while pouring the batter? Or will they mix?

whatever method you use -- will mix in middle only if you do as I do and run a knife back and forth to create a little section of marble cake!

divider works -- I make mine from aluminum foil. then pour on each side, remove (swirl if like) and bake

for more coordinated: (as if I could ever do it this way!)

1) pour both at same time -- one at each end -- they'll meet in the middle

2) tilt pan up on one end -- fill lower end w/ one batter, then set level and pour in other batter quickly.

http://www.cakecentral.com/cake-decorating-ftopict-605736.html
Another thread all about this !

When I have to do a half and half sheet cake, my husband helps me. I take one flavor in a bowl and he takes the other. We start pouring together, slowly, and then the batter just gradually meets in the middle. Your center line won't be perfect and that is OK.

Good luck.

Dupl thread .... see other responses at http://forum.cakecentral.com/cake-decorating-ftopict-612958.html