I am SO upset right now I could just cry...I made a Groom's 3d tire cake covered in fondant, using chocolate cake and buttercream and now the fondant is peeling away from the cake. I added splatters of chocolate buttercream to the sides and top of the "tire" to look like mud, but now there are also small cracks starting to form under the "mud" spatters. I'm just sick about this and am not sure how to fix this for tomorrow's wedding.  ANY advice sure would be a Godsend :(

can you show us a picture?

AWhat kind of fondant? Was the Bc under the fondant super stiff?

AYes a picture tells a thousand words and maybe we could help.

AOh no! I remember you asking advice on how to make this cake. I know it must have taken many many hours.

There's nothin worse than planning, researching, designing, & laboring only to watch it all fall apart.

Is it because the buttercream is softening the fondant?  Is the problem just where the buttercream is on the fondant?  scrape off the buttercream and replace with

fondant or royal icing mud - a little bigger to cover the cracks?  If the cracks are too big, but might be best to re-fondant, and use someithing besides buttercream for the mud.  Sorry, I am sure you were/are up all night

Sorry I wasn't able to post sooner (or post pictures), I was too busy scrambling to fix the Groom's tire cake, but THANK YOU to everyone who took the time to reply...

Yes, the buttercream did soften the fondant and I was up all night...worrying! This morning, I ended up patching it up best I could and after delivery and set up this afternoon, I positioned it so it looked alright. I j

ust hope more didn't peel off after I left.  Picture of finished cake is attached.

What I'm thinking is that the cake I used was too moist and soft.  I put foam core between every two layers, doweled the layers for supports, and put 2 dowels through the entire depth of the cake, but it still settled A LOT and caused the fondant to crack, which in turn made the fondant peel off at it's weakest spots.  So my question is, which cake is the best for 3D cakes? Obviously the chocolate cake I used was wrong for this particular application.

Have a wonderful Memorial Weekend everyone and thanks again for your replies

Nice!  I love the mud on the big cake.  It looks great, no one would ever know.

I think they look great, the bride's cake is fabulous!  I think that yes, your cake was the culprit, didn't hold up. But you saved it and did a great job!

The giant cake is lovely, great color seperation. weldone. don't get mad at the peeling cake, sure the mistake won't be repeated next time. Weldone!

your cakes look very nice. have you tried to use a mud cake recipe? they're very sturdy cakes, taste great and very easy to make. there are a lot of recipes here for mud cakes.

Glad you figured it out. The end result looks great. 

Thanks for the assurance, everyone 

Cakefat...what is a mud cake?

Moyorfore...Thanks so much! Each layer was a different flavor of cake and frosting, so it was a challenge doing the ombre without all the icing being the same. I don't think I'll ever let that be an option again though, since it was a lot more time consuming!