Step 5: Testing the fit
Next I warmed up the large knife with hot water, then cut out a 4x4 chuck of the Jello from the cake pan. I then placed it into the space I had just made in the cake and, to my relief, it fit. I took it back out and placed it aside for now till I decorate the cake. You can smooth the Jello by heating up the blade of the knife with hot water and placing it up against the side of the Jello. This melts the Jello, so be careful not to melt too much.