I,ve been asked to do a sheet, half chocolate & half yellow. Advice on how to do this would be appreciated! Just need to know what to use as a divider! Also a 12''x18" is a half sheet cake. Is that right? Thanks
I grab both bowls at one time and pour.It would also be easier to bake 2-9x13 instead of a 12x18..then you can bake each flavor and set each cake side by side.
or fold a long enough strip of aluminum foil to act as the divider -- place in middle, pour one side, then the other. remove foil and bake.
but.....
in my experience, chocolate cake and yellow cake do NOT bake as same rate.
so I too have gone to Kiddiekakes suggestion of two 9x13 side by side -- I just put BC at the joint to hold them together and use a good stiff cake board to prevent cracking apart.
or fold a long enough strip of aluminum foil to act as the divider -- place in middle, pour one side, then the other. remove foil and bake.
but.....
in my experience, chocolate cake and yellow cake do NOT bake as same rate.
so I too have gone to Kiddiekakes suggestion of two 9x13 side by side -- I just put BC at the joint to hold them together and use a good stiff cake board to prevent cracking apart.
ooohhh that's a smart idea, lol - I never thought of baking 2 9x13's! I just put a folded dish towel under the bottom of one side of the pan (gives it a slant), then pour one batter in, then when my second batter is ready I start pouring the batter in and remove the towel at the same time...it works for me 
I agree - if you have two people, you both pour. If it is just you, I would make the foil divider. It takes two seconds. You get a nice divide. Then take it out after you pour the second batter.
I understand the different batters baking thing. However, you might want to drop your oven temp to 325 F and bake a little longer. It will probably make for more even baking.
I do this a lot...I just bake two 9x13s and stick them together with BC on the cake board.
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