Step 1: Size the sponge to the bottom of the cake box and make the cake smaller than the box.
Step 2: Cut the sponge using a long serrated knife. It can be kind of tricky so you’ll want a really good one.
Step 3: Cut the cake in thirds.
Step 4: Spray the edges of the cake in descending colors. You’ll want to let them air dray for at least a day to get rid of the fumes.
Step 5: Pump the caulk into the cake bag.
Step 6: Line the edges of the cake with the caulk. I did two different types: one messy and the other more decorated like a traditional cake. The caulk can be really runny so you might want to practice before you apply. Let the caulk dry for at least 2-3 days.
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