To get a perfectly stacked cake you need even layers, and I hated letting a sunken or uneven layer go to waste. Here is my simple trick!
Use a level to even off the edges, take the cuttings and mix them with a little frosting, then use the mixture to fill in the sunken center. It will support the next layer you place on the cake and it tastes delicious- like the inside of a cake pop. I have had people ask about “that delicious layer” and of course the best part is your beautiful, perfectly level cake!