I got the idea off of Pinterest (I am officially addicted to the website – so many recipes and cake ideas, so little time). The cake in the original blog post was pink, and it looks incredible. Check it out here. I did a purple cake for our legal assistant Carolyn’s birthday. I only did 4 layers, but still had room for 4 swirl colors. I used the vanilla cake recipe from Sticky Fingers. I doubled it and added Wilton’s violet food coloring to 3 of the cake layers.