As always I am constantly striving to improve my baking skills, so I tried a couple of things using half of this recipe. The minor ingredient amount changes are in my recipe book page on this website.
The biggest discovery and great results came as I tried baking my single layer, surrounded by a towel strip that I pinned around the sides of the pan. Not only did it eliminate the cracking, but also took care of the bulging in the middle.
The crumb of the cake was excellent, it was moist, and baked evenly throughout.
I also baked this cake at 340. Next time I will up it to 345 and see if it makes a difference. I will let you know.
Below is the website that explains it a bit better. Take the time to look it up. It really works.