their original idea. But next year I plan to try this again using a chocolate cake. I'll let you know how it goes.
In the meantime - melting peppermints is a breeze.
Heat oven to 300 F.
Line a pan with parchment paper and mark out 1.5 - 1.75 in squares on the back side (you don't really need to do this and if your peppermints seem bigger go farther apart, smaller go closer together. Since mine didn't melt perfectly together I swirled them with a toothpick.)
When them come out score with a pizza cutter along your lines. Once cool they'll break right apart.