Please help, my 2 tier baby shower cake is starting to magically show hairline cracks going up and around the sides of whole cake, kinda like it wants to peel of a little layer! What happened..I tried to resmooth with viva..and it helps some but im afraid its getting worse?? had same problem yesterday on a sheet cake with no filling so i know its not a stack issue...MY buttercream is sams club which i have never had an issue with??

Please help me!

What kind of support are you using for the board?

I had a cake do this and figured out it was because my board had a little give in it. If it's not completely sturdy, your cake is being shifted, causing the buttercream to crack. Could that be it?

I had this happen once so I used a paper towel that had a pattern on it and smoothed the cake. The imprinted pattern hides all cracks and it looks great too. You will get people asking you how did you get the pattern.

you don't have enough support under your cake or your cakes are settling. leave it till the morning...it's the cover of the crusting buttercream that you are seeing. also, if you have it in the fridge the fridge may be too cold. I've had that especially happen when I take the cake from the cool into the heat PLUS the lack of support under the cake

But I dont think those are the answer because, the cake was left already over night to settle, and i had a masonite strong board under it.. I was able to smooth most of it out again with a paper towel but hte cake i had already decorated with fondant accents I couldnt get to to smooth...it.. I have decided it must have been a fluke..my other cake i did the same way and it was perfectly fine..

Could the weight of the fondant piece have been pulling the icing off the side of the cake? Did you see any cracks in relation to where the fondant was placed? Any pictures of the cracking?