Yams and yuca have thicker, waxier skins compared to potatoes, requiring a knife for peeling rather than a vegetable peeler to effectively remove the outer layer and any underlying rind.
The primary reason for peeling yams and yuca differently than potatoes lies in the structure and composition of their skins. Potatoes typically have a thin, relatively smooth skin that can be easily removed with a vegetable peeler. Yams and yuca, on the other hand, possess a much thicker, tougher outer layer. This thicker skin often has a waxy or fibrous texture that a standard vegetable peeler struggles to penetrate effectively.
Furthermore, yuca often has a pinkish or brownish rind just beneath the outer skin that needs to be removed as it can be bitter or even toxic in some varieties. Using a knife allows you to ensure this rind is completely removed, which is crucial for both taste and safety. The process generally involves cutting off the ends of the yam or yuca, standing it upright on a cutting board, and then carefully slicing downwards, following the contour of the vegetable, to remove the skin and any underlying rind.
To make peeling yuca easier, briefly blanch it in boiling water for a few minutes. This will loosen the skin and make it simpler to remove with a knife. Be careful not to overcook it, as you only want to soften the skin, not cook the flesh.