Good Morning! Have several questions. I baked a 9x13 sheet last night and turned it out to cool on the extra rack in my oven. This am I went to turn it over, and the cake had literally almost split completely in two and in other places. After thinking, I know that the weight of the cake and being forced onto the rach is what caused this.
I know that I can still level and use this cake and no one should ever know. But, here are my questions; 1-can I still fill this sheet cake with strawberry perserves?
Secondly - I am baking an 8" round tonight that will sit on top of this sheet to resemble a hill with a barn on top of it. The 8" will be carved and the barn to be made from graham crackers. 2-will the sheet hold the carved 8" without doweling and separating?
Thanks in advance for you help! T 
should be fine, I've filled cakes that were several smaller cake all shoved together and iced as one and I don't see how a cracked sheet cake would be any different!
It will be more difficult to fill in sections, but it should still work!
Sometimes when I fill my 12x18" cakes I cut the cake into 2 layers and then cut down through the top layer making it 2 smaller layers so it's more manageable and I've never had trouble with it. As long as your dowels are sturdy and will stay standing up straight and not wobble the cake underneath won't matter.
Question about the cake that split, did it have a hump on it? If so when you flipped the hump down, gravity pushing on the thinner outside edges is what caused the cake to split.
You can either trim the hump off before flipping it out, or double flip it so the hump is up.
It had no hump in the center at all - abnormally almost flat. It didnt split until sometime in the night. I am assuming a settling action and the rack had too large of a gap between each one to support the cake as it settled.
Double flip is a great idea - didnt think of that at all.
No, it didn't continue, but it wasn't very deep. Fortunately, I didn't need to touch the center to do the carving. I had a large oval cake completely split once. I was able to torte, fill, repair the split, and then stack a filled character cake on top of it with no problems. Just make sure your cake boards are really sturdy so there's no flex when moved.
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