I have a client that will have a child at a birthday party that is allergic to yellow dye #5. I have ordered some natural food coloring but told her that I would just cover the cake in buttercream instead of fondant due to the allergy. She wants the cake to be a topsy turvy with blue and green colors (I will do a two tier). Would it be very hard to cover the cake in white fondant and then airbrush the two tiers? The fondant is just so much prettier with this style of cake. Any suggestions would help. Thanks

You have to mix blue and yellow to make the color green. Are you sure the green has no yellow die in it?

All green or blue fondant that I have looked at has yellow dye #5 in them so that is why I told here that I would just be doing the cake in buttercream

...but then you mentioned airbrushing. I thought you were talking about airbrushing it with those colors.

Couldn't he just peel the fondant off? If you're airbrushing the outside only with green, then the liquid dye won't touch any of the inside cake....

You can have a VERY difficult time locating a colorant (airbrush or otherwise) the you know for CERTAIN does not contain the allergen Yellow.

The ingredient list on colorants typically state "may contain" and then list ALL the possible colors. There are a couple reasons for this - including color "recipe".

I have already bought some natural food coloring from India Tree but was just wondering if it would be worth covering the cakes in white fondant then airbrushing them or should I just go ahead and cover them in buttercream