Hi I'm making a 3D Elmo Cake. Last time I made one I I used red buttercream to make his fur. This time the cake needs to travel for about an hour by car and I was wondering if it would work to pipe royal icing over ganache instead. I thought that combination might be a bit more sturdy if it warms up a little bit in the car. has anyone ever tried this? Will it work, or should I just stick to a stiff buttercream?
Thanks

I'm not sure. I suggest that you just stick to what you are more comfortable with.