I still can't master frosting a square cake. My corners always come out rounded. I also tend to pull the cake off when doing my crumb coating just at the corners. I also have issues covering square cakes in fondant. I always have this extra fold where the 2 sides meet.

Am I doomed to make round cakes forever?? Please share your tricks!

you are certainly not doomed, i had the same problems as you, and every now and then, they will come back for no reason ! lol! i always find it very hard to ice if the cake is moist, it tends to tear against the frosting. i think spending a little more time on the corners of a square cake really makes the difference, im sorry i cant tell you any better techniques.

Lorraine mckay has a tutorial on how to cover a square cake in fondant so that you dont get folds, its on youtube i think her name is aine2

Hi, here is a great tutorial from Serious Cakes,

http://www.youtube.com/watch?v=vyKkLwTE9NE&feature=channel_page

Sugarshack's Buttercream DVD is fantastic too!

ditto on the sugarshack dvd... my square cakes are dramatically different! along with sharon's techniques, i put my cakes on a board about 1/4 in. larger than my cake size and use it as a guide for my bench scraper since i could never manage to keep it even all the way down the side!

http://sugaredproductions.com/buttercreamdvd.html

Perfecting the Art of Buttercream DVD by Sugarshack gives excellent tips for frosting a square cake!

Thank you all for the suggestions, I'm definitely going to check out that DVD. THANKS!!!

Here is an article on how to get the sharp edge with buttercream.
There aer pictures to guide.
http://cakecentral.com/articles/109