Fun to do, although "filling in" of stained glass colors took 12 hours. I used CK pre-colored piping gel and then mixed them right on the cake for additional hues. Was up 'til 5:00am as a result of my gross underestimate of how long it would take! Cake is choc./butter marble with ganache filling. Slumping "new formula" Crisco caused the only problem, otherwise was just a tedious cake but still enjoyable.