3. Using a cookie cuter or bowl, slice a circle out of one of the red layers, one of the white layers, and the blue layers.
You won’t need the outer rings of the white and red layers nor the inner circle of the blue layer for the cake, but save them for a snack later. Use a 4” round cookie-cutter (or a bowl) to cut a hole into one of the red layers, one of the white layers, and the blue layer. We promise you won’t have holes in your final cake.