I don't work with fondant very much. But this last cake request needs to be covered in fondant. I can get my cakes very square with buttercream. But when I put the fondant on, the corners sag and my cake ends up looking like a square cake with rounded edges. Am I doing something wrong or do I just need more practice. I am disappointed with the way this cake is coming together. 
Thanks for any advice.
If the fondant is thin, it will help create better lines for you. You do have to work with it a bit, it won't just fall on the cake that way. Work it with the smoothers.
Best wishes....
Jen 
my square cakes always have a rounded edge (with fondant) you can get them to be more crisp. but like leahs said, the weight naturally pulls it down. Im sure AINE2 on youtube has a video for covering a square cake with fondant. its pretty good. i find it helpful if you use TWO smoothers like in sugarshacks dvd, so you can square the edges up
Does anyone else have the problem of fondant crinkling on the bottom edges of a square cake? I'm still fairly new with working with fondant. All the pics I've seen have such perfectly smooth corners...mine look like they have little pleats at the bottom corners! Any help is greatly appreciated...thanks!!
ive had this problem many a time!!! its simply a case of keep pulling the fondant out and smoothing all the way around!!! i normally have one corner in the back thats got a slight fold in ( i try n make sure its always in the back so its not seen !!) i think its takes quite a bit of practise to get this right, but aine2 youtube video shows it perfectly and she doesnt have folds! give it a look defo worth a watch!
Sounds like you are just not getting it smooth??? I take each pleat and pull it from side to side to smooth it out. It's really a very easy process, you just have to take things one step at a time. When people see how easy fondant is to do, they can't believe they waited so long to learn it
Jen
Caths -
If you are getting it smooth in the front and sides, you should be able to do the same technique on the back and have perfect fondant.
Not sure how you are doing it....
Jen
i do the way you describe, i keep pulling and smoothing, but for some reason in the back, i always get a 'bump' of fondant. im trying to think of way to describe it, its almost when i smooth it down to get the fold out, its causes the fondant to almost push along the side of the cake. i dont do square very often, think i just need more pracitse realy 
Pull the fold from side to side, don't push it down. This will smooth out the fold, then use your smoothers to refine the area.
Try it, it might help you.
Jen
Best wishes Caths.... I think we should strive to get our cakes perfect all the way around, not just the front
You CAN do it girl!
Jen
work like this: corner, corner, middle
corner, corner, corner, middle
etc.....
OK I've been pushing down...no wonder!! That must be where my creases are coming from. Thanks for the info! I'm going to keep practicing because I really love working with fondant otherwise. Thanks again!!
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