I heard this idea from somebody in my life, a few weeks ago, but I just don't remember who. Whoever it is, you know who you are. Thanks for the idea! I just made a regular cake and then cut it in half, and stacked it on top of itself. But I DID have to cut the top off first (so it was flat instead of rounded) and I was so very proud of my amazing flat cake top that I took this picture.
I left a little piece so you could see how perfectly I cut it.
The only catch about this cake was that I don't own a circle cake pan. And you can't make a half SQUARE cake because then it just looks like a regular RECTANGLE cake. But luckily we have this circular springform pan which I stole from my dad. I put shortening all around the bottom of the pan in the crack, and the batter didn't leak out. I'm not really sure if it would have leaked even if I hadn't done that. Better safe than sorry though!
So we had half a party to celebrate half of James' 25th year of life. Of course he thought he was so very funny to greet me with half a kiss when I came home. Then I told him he could do half the laundry. Just wait until his real birthday!