I posted a picture of this cake on our Facebook page a while back. While going through my daily Purple Google eLerts, I found the recipe! The recipe says it “uses a special purple food coloring that comes in a soft gel paste (available on Amazon). It is highly concentrated, so if you decide to use normal food coloring, you’ll need to add several dozen drops, or more, to get the desired color.”
If you try it, please share it on our newly redesigned Facebook page!
Have a GRAPE Day!