Years ago I posted a list of yeasts that could be harvested from commercial brewed beers. I kept up with it for a little while and then it grew out of control. Haven’t brewed beer in several years now but have been making cheese. The thought crossed my mind “can I harvest blue mold from commercial cheeses?”. I haven’t tried to make a blue cheese yet but would like to. All the sources I have found for specific “blue cheese molds” either are too expensive or much to large quantities of mold that I will probably never use up. Would it be possible to take a commercially made blue cheese and somehow propagate reusable mold from that? I have read that some people place a piece of blue cheese on a slice of bread and then let it grow. That seems like a good way to also gain some unwanted molds as well. I was thinking of taking half a container of blue cheese crumbles, about 2oz, blending that up with maybe some buttermilk and then mixing the solution in with the cheese at the normal mold addition based on whichever base recipe I choose. Is this possible? Will it be enough mold?