Share a little about the materials, processes, and techniques used to create this cake - Buttercream: the recipe is from the Modern Buttercream class- Yellow cake mix from the grocery store- Blue sugar sprinkles from the grocery store What are you most proud of? Everyone loved the cupcakes. It's a great project to work on your buttercream-making skills without the fuss of making a three-tier cake. What advice would you give someone starting this project? It's so easy. You can make this in one evening.