If you mutate a certain part of the genome of the blue cheese fungus, blue cheese gets a different colour from the traditional blue, write British researchers in npj Science of Food.

Blue cheese is made using the fungus Penicillium roqueforti, which releases blue pigment spores as the cheese matures. But what if you could change the colour? Researchers at the University of Nottingham must have thought so too, because they started tinkering with the mould to see if it could be done.