I've seen a beautiful cake with piped peacock feathers. They have lots of gold swirl/lines coming off the feathers (metallic gold). Would this be possible on buttercream? If so... how do I do it? Thanks.
Matalic gold is NOT edible - unless something new is on the market. If the swirl are coming *off* the cake (stickikng out from) then most likely they are non-edible wires.