I fellow your tek but when I get the buttery paste of dry I sand it through a strainer to get rid of the black bean shell. Then I had a few ml water and cook it back on a pan (hope the heat won't cook the bufo).

Now I have yellowish powder with few brown grain. I just took a tiny line, it's not burning my nostril and don't drop any larks

I will have to wait the weekend to dig the experience of this snuff.

Tell me if you think this boiling might not be good for the bufo.