I am making a cake for a small wedding this weekend. It will be an orange cake filled with cocoa-Nutella SMBC. I was wondering if I can use the same filling as frosting to go under white fondant. Thanks.

I've used chocolate buttercream under white fondant and it was fine. Just don't roll it too thin. And get it on right the first time, cause if you have to pull it off you'll have brown icing on your white fondant. Yeah, guess how I know.....

Thank you Alana! I will try it tomorrow.