Share a little about the materials, processes, and techniques used to create this cake Hand-sculpted silicone mold. Cast and torched clear isomalt. Airbrushed on the back. Colored Cocoa butter on the front to make the leading. What are you most proud of? I sculpted a medieval revival style rose in clay and was quite pleased with how it turned out. What advice would you give someone starting this project? Casting isomalt in molds will often leave a layer of tiny bubbles on the piece. A micro torch is commonly used to smooth out the surface - so the mold has to be over detailed in order for the design to hold up to the torching step.