I have to make a Tiana (princess and th frog) cake. I was wondering if anyone has had any luck with making purple buttercream and have it actually not taste like food coloring? What is the trick...the last time I made purple it had a bitter taste. I would usually suggest fondant, and airbrush it, but they want buttercream...PLEASE ANY HELP!!!! I have to ice this cake in a few hours...so any help now would be great...just though maybe someone has an idea/suggestion...thanks for your helP!!!!

You can airbrush buttercream.

But what kind of food colorings are you using? I've never had an issue with a bitter taste (I mostly use Americolor gels) but I've heard that the darker Wilton colors can have that problem.

I know it's to late now, but Saturday I made some purple buttercream pretty easy with Wilton Royal Blue and Wilton Rose colors. It came out a decent purple and tasted just fine. I did royal blue first then added rose... if you wanted a more vibrant purple I would add rose first (I heard Americolor calls theirs 'electric pink') and then add royal blue until the desired tint is achieved.

I'm excited cause today I am ordering my first set of Americolor gels and airbrush colors ever!! Woooooooooo!

Again, sorry I didn't see this until today... but I hope it helps your future projects.