Any suggestions as to how to keep white looking white when it's applied over a dark color? I have to do a cake with white over dark brown and white over red. I've had problems before with white over dark green. About 24 hours later, the white doesn't look white, as some of the underlying color comes up through the white.

Any help with this is so appreciated!!!

Are you applying buttercream or fondant?

buttercream I assume? You could decorate with royal icing once your buttercream crusts.

If you're frosting with buttercream, just make sure you use enough icing (within reason) to cover the cake underneath - do a crumb coat before applying the final coat of icing. Here's a link to Edna's video tutorial on icing a cake. It's well worth a look.

If you are applying fondant over a dark cake, be sure to do a crumb layer in white icing before applying the fondant. This should help to cover the dark color of the cake.

Otherwise, I would do what aligomatt suggests - have fondant or royal icing decorations planned to decorate once the fondant or buttercream is on.

Good luck!

Yes...all buttercream. Sugarshacks recipe.