I realize these are not ruffles. These are rice paper butterflies, which have been dusted with petal dust, on buttercream. There is another butterfly cake, similar in my portfolio if you look. The only issue with the rice paper was keeping it in the fridge. I live in a very humid climate. I iced my cake, attached the butterflies, and placed the finished cake in the fridge. When I removed the cake, the butterflies started to wilt and melt from the humidity in the air and the condensation. I had to make new butteflies (no biggy, I had a butterfly punch) and attach the new butterflies to the cake right before it was ready to go out the door. I hope this helps.
Psalm 127:1 Unless the LORD builds the house, the builders labor in vain.