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Correspondingly, why do my potatoes have black spots inside?
Black spots are usually bruises caused by roughhandling. The second type of bruising shows up just under the skinor deeper inside the potato as a black spot.This happens when potatoes are dropped from a hight of morethan six inches or when something heavy is placed on top ofthem.
Hereof, what are the black spots in russet potatoes?
A Small Black Dot If you look at a normal, healthy russet or othernew potato, you'll notice that its surface is covered with ascattering of small freckle-like dots. Those mark the poresor "lenticels" where a potato's skin breathes. Like the skinon an adolescent face, those pores sometimes getclogged.
While green potatoes are the most obvious signthat they have gone bad, there are other, less evident,signs that you need to consider. Avoid potatoes thatare green, wrinkled, soft, mushy, moldy, with scars or bruising andif they have a bitter taste. Sprouts need to bediscarded before cooking the potatoes.