re: Why did my grey fondant turn green???

Maybe it’s the mix of tones?? The fondant I mixed up as black stayed black, but the fondant I only added a little to get grey shades went almost eucalyptus!!!!
Not a happy bunny and although the customer didn’t seem overly worried I wasn’t happy handing over something I’d spent a lot of time on that wasn’t how I wanted it to be xx

karen,Gwynedd