For those who are curious, I made the grad cap cupcakes by making simple yellow cake cupcakes topped with vanilla icing and a Lindt chocolate square (I used different variations of dark chocolates: 85%, 70%, 60%, and the dark chocolate with a Touch of Sea Salt, which by the way is absolutely delicious and tastes incredible by itself). Then used a little tinted icing to make the tassles.
The graduation cap on the UNC Carolina Blue cake is made from halved blueberries and has a layer of warm seedless raspberry preserves to make the cap shiny. That was a simple yellow cake with vanilla icing. Matt’s graduation cake was a simple yellow cake with chocolate icing.