Hi all, please help me!

I made my husband a birthday cake from Stephanie's recipe so that I could cover it with fondant, which really worked well

so I don't know why this time I can't make it work.

My cake rose quite well then somewhere along the line sank but the sides stayed up along the pan. Sinking is normal for chocolate brownies but this was extreme. I then made a huge mistake and took it out while it was still warm so it lost it square shape too. I actually need cube shapes to make this cake.

http://www.marthastewart.com/265615/baby-block-cake

I promised chocolate cake so I would prefer somehting like that but easier to make so that I don't mess it up. Also, this took 680g of chocolate and now I'm a bit low. :(

This is equal to 3 cake mixes. So you may want to cut it in half. It starts with a box mix but many on here use it. I personally love it.

Chocolate WASC (macsmom's method ) - MacsMom
2 dark chocolate cake mixes
2 c cake flour (gives it a lighter crumb)
2 1/4 c sugar (extra sugar for moistness)
1/3 c cocoa powder
3/4 t salt (less salt because of the cocoa powder)
2 pkg chocolate fudge pudding mixes
8 egg whites or 6 whole eggs
2 c sour cream
2 c coffee
1 c chocolate milk (extra liquid because chocolate mixes tend to be thick)
1/3 c oil
2 t Nielsen Massey's chocolate extract
2 t vanilla or butter extract
 

Thanks. That sounds amazing.

Unfortunately it would be too expensive considering what I already spent today on all my ingredients. Also we don't really have all the same things here in South Africa that you do like we can't get dark chocolate cake mix. I will try that some time though. Is it moist?
 

It is sooo moist. My favorite one is the orange dreamsicle. And the white is the only white I have ever liked.