I am making a buttercream covered cake, with fondant decorations.  I will be using Tylose glue to glue the fondant decorations onto the buttercream. I will be placing some Elmo faces, circles, and stars onto a 2 tiered cake.  The cake is needed early in the morning, so I have a few questions regarding the order of assembling the cake. 

After I frost the cake, should I stack it and let it sit in my fridge over night, and early in the morning put the fondant decor all over the cake?  Or can I stack the cake, and put the decor on immediately, and let the cake sit completely finished in the fridge over night (12-15+hours before the party).  This is what I would rather do, but I'm not sure how the cake will hold up, and how the fondant decorations will do in the fridge...

Should I put the fondant decor on the cake layers first, and then stack the cake?

Sorry for the questions!  I am new to this and this is one of my first really big cakes.  I would hate to have something happen last minute and ruin it! 

Hi Suzie88---I can't offer any advice on your situation.  Though I feel like I could have written this post.  I'm in a very similar situation with trying to figure out how to handle a buttercream cake with fondant accents.  I hope you get some input from the great people here that are experienced with this sort of thing because I'd love to know.  

Side note--I noticed you said you are using tylose glue to attach the decorations to the buttercream.  Do you think that will adhere/make the decorations stick better than just using buttercream as the glue?  I was going to use buttercream for the glue on mine but now I'm wondering if this will have enough sticking power.  

Hello there.   I always attach the decorations with a skim coat of buttercream to a chilled buttercream cake.  I always finish my cakes the day before delivery and I leave them in the fridge until then.

As far as the stacking/placing  on the decor order, it's up to you.  For something like fondant decorations, I like to stack 1st then add my fondant pieces.

Hope this helps you.  Good luck!!

I'm not really sure why I use Tylose, I guess someone just told me to do it. I've used it for putting fondant accents onto buttercream for a few cakes, but I really only had a couple of small decorations to add to the cake.  So now i'm curious why use Tylose vs. buttercream as glue?  Does one hold up better? Does it matter if my buttercream is a crusting buttercream?  

So, if I decorate the whole cake the night before, and deliver it cold the next morning, will the cake be fine sitting out on the counter the next day with the fondant accents?  They shouldn't slide off at all, unless its in sunlight outside right? 

No, it doesn't matter if it's a crusting buttercream.  I've done it with both a SMBC and a crusting ABC and both were fine.  They won't slide off unless the buttercream itself is melting off.  

..........if I decorate the whole cake the night before, and deliver it cold the next morning, will the cake be fine sitting out on the counter the next day with the fondant accents?  They shouldn't slide off at all, unless its in sunlight outside right? ..........

Everything should be fine.  Of course your weather might have a baring on it but unless it is 90+ humidity you should be fine.  I've delivered b'cream cakes in 90 degree weather but no humidity w/o a problem.