It's hard to tell isn't it. My guess is that it's buttercream, I think I can see a few patches that might give it away - but overall it's very smooth! The sugar would stick better to BC as well.
You could do it either with BC or fondant. To get the sanding sugar to stick to the fondant, brush it with a very thin layer of piping gel.
I've never heard of sanding sugar - is it a specialty cake thing? Where do you get it from? I really like the look of it!
Yes...this cake is from the Wilton Tiered Cake book. I saw it at WM and HL. Not hard at all...you can do it!
I have not tried this before as I would be afraid it would be difficult to ensure the sugar is applied evenly. I have seen it done with fresh buttercream before. I would agree with piping gel for fondant. I would try a sample piece to be sure.
I thought it was sparkling sugar not sanding sugar that it was covered with
this is a fondant covered cake coated with piping gel and has sanding sugar added.
Here is a pic from CC
Thank you guys for all your help! I'll be sure to look in the Wilton Tiered book for this also. I'm keeping my fingers crossed that this turns out well.
Wilton makes a white sparkling sugar that is coarse and shiny. There may even be some sparkle dust or disco dust mixed in on that cake.