What appears as mold on fresh on good parmigiano reggiano cheese is actually not mold at all.
The spots that appear on parmigiano reggiano cheese that looks like mold is actually crystalized amino acids.
The surface of the parmigiano reggiano cheese turns a bit darker when it gets cut and exposed to air making the crystals easier to see.
Actual cheese mold is blue or green.
So if the mold spots look like the below picture on your parmigiano reggiano cheese then it's not actually mold but instead just the harmless crystalized amino acids.
