The factory cake means the cake is supposed to look like a factory where planets are built, like in Hitchhiker's Guide to the Galaxy.

And 10 points for the boob cake! All my friends called it that too!

You made a boob cake too!!!!

I think it demonstrates fine creative flare. What's a factory cake?

My mom was trying to prove that I'm not the only one in the family that can bake on my birthday. Supposedly it's a planet factory cake!

that's a fine looking cake