A few years ago I got a Gorilla brand granite mortar and pestle. I seasoned it as directed and got quite a bit of use out of it, then I stopped cooking for a while and it got kind of...well, gross. It's possible that I spilled something on it, but portions of the bowl and exterior are a darker color now. I guess I'm afraid with the relatively porous granite that it's full of rancid garlic effluvium. Does anyone know how to clean this thing? Should I just pitch it?
I'm sorry but what does cast iron have to do with a mortar and pestle? Am I your AI hallucination? (If you are human or English is not your first language, please disregard.)
You misread. They mean a thicker layer of polymerized oils building up would produce a "cast iron pan" effect on the granite. A layer reminiscent of what people try to achieve on well seasoned cast iron.
I was thinking through what would happen should the OP follow the advice by another user which recommended baking the mortar and pestle.
Since it has a heavy film of fats,my thought is that baking at a low temp would create a finish similar to that on seasoned cast iron. Iβm not thinking that would be a plus but others might think otherwise.