Potato skin thickness has more to do with length of time in storage. Freshly-harvested (new) potatoes have thinner, flakier skins – while potatoes held in dormancy for months in our sheds develop a thicker skin. In any case, the skin, like the potato flesh within, is loaded with flavor and nutrient. If you’re a fan of skin, simply wash and leave skin-on when preparing for added visual effect and genuine, rich flavor.