This is the two-step buttercream someone brought over from the Wilton site. Lovely to work with and not very sweet. The design was transferred over via a buttercream outline, just like a piping gel transfer, but I was running out of gel and wasn't sure I had enough to spare. The buttercream outlines worked fairly well. I got some skips in the design, but was able to fill them in. "Glass" is piping gel, of course. Next time I think I'll do an edible image, brushed with piping gel instead.