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.

This cake starts with three vanilla sponge layers — get the full instructions for making them in the recipe. Once your cake is baked, it's time to cut out the letters. Print our OMG templates and place them close together on one of the layers. Use a sharp knife or a kitchen-dedicated X-acto knife to cut the letters out. Repeat the process with the remaining two cakes.

Place one set of letters on a 14-in x 18-in cake board spacing them 1-inch apart (a big platter could work too). A solid start is key to decorating success here — you'll appreciate the cake board when you're ready to move the dessert to your party buffet table.

Pipe mounds of buttercream (see the recipe to learn how to make it) in alternating colors onto the cake — the individual dollops look striking in-between the cake layers. Stack one set of matching letters on top of the first set of letters. Pipe the second layer of cake with more mounds of buttercream.