We love a cake that knows how to express itself. In case the triple rainbow layers and technicolor decorations weren't clear enough, this cake comes right out and says how it feels — OMG! For this dessert, we were inspired by the Instagram-famous letter confections made by baker Adi Klingofer, but we dialed hues, candy and pizzazz all the way up to 11. Here's how to we did it, but don't forget the best part — the cake is totally customizable. Make it with whatever letters, colors and decorations you like.