Yellow boxed cake mix, but use 3 eggs, melted butter instead of oil, and half water and half rum when making the mix.... then after it is baked but still hot, poke holes in it and pour over "sauce" made of melted 1/4 cup sugar, 1/2 stick butter, 1/4 cup rum 1/8 cup water
Drizzle melted chocolate frosting over cake when cooled