My son wanted an Earth cake that was a full globe and had the core, mantle, etc inside for his sixth birthday. Well… We almost ended up as flat earthers. Instead we have a hamburger shaped Earth, since I vastly underestimated the amount of batter I would need for two full hemispheres.
I made white cake balls, then put them in a small hemisphere filled with yellow cake batter, baked that, then did the same with a large hemisphere pan and red velvet batter. It domed so much that I don’t think the layers will show when we cut the cake. ¯_(ツ)_/¯
I didn’t take pictures of the process, but these are the pans I used.
If it’s worth it when we cut the cake tonight I’ll post pics of the inside.
The outside is just plain old American buttercream with terribly disproportionate land masses (Hawaii is huuuge! ) and a star approximately where Dallas (our home) is.
We had leftover yellow batter so I made a small hemisphere and made the moon to complement the Earth. There would have been a comet, but someone decided to sample the cake.
Kiddo loves it, and that’s all that matters to me.
Edit to add inside view it turned out pretty good! The white core is super small, but I don’t think it made that much of a difference.