Oh Ruth don't tell me that.. LoL! I was betting with my wife that anyone who used chopped/ground nuts were covering bloom.
I agree totally on your observation. This isn't a marriage made in heaven, a minutely slippery surface with a material that likes to shrink when cold, release well when tempered, and isn't thatporous.
Right now I love a 60% chocolate sea salt but it's a rather naked product so you see a bloom happen. Someone said they liked how it looked, like we did it on purpose. Heh, that gave me a giggle.
I do a white chocolate honey toffee and I have a consistent <= 1% shearing of the white chocolate but since we know its composition is so much more--buttery and the honey is just a little more tacky I can't use it in comparison.
I've been real watchful of toffees since trying to solve this, there's got to be a knack for getting some greater consistency. I have 9# of toffee to make by the weekend so I'll attempt the cocoa idea and see if anyone else has some thoughts.