The central operation involves subjecting Castanea fruits to heat in a liquid medium to achieve a softened texture and facilitate shell removal. This cooking process uses water as the primary heat transfer agent, promoting the breakdown of complex carbohydrates within the nut.
This culinary technique yields several advantages. It renders the inner flesh palatable and easier to digest, and aids in the separation of the outer shell and inner skin, crucial for further preparation in various recipes. Historically, this cooking method served as a fundamental means of preparing the nuts for consumption, preserving them for extended periods, and enhancing their flavor profile.