Moisture migration is the movement of water within or between components of a food. It occurs during cooking, cooling, storage and service, and it can change texture, crispness, weight and shelf life. Water generally moves in response to differences in water activity and chemical potential, rather than simply moving from “wet” areas to “dry” areas in every situation.
Use barriers such as suitable fat layers or chocolate coatings where appropriate, keep wet and crisp components separate until service, cool products before packaging when required and select packaging that matches the intended storage conditions. Venting may help preserve crispness in some foods, while sealed packaging may be needed to prevent drying in others.
Moisture migration is the movement of water within or between food components. Evaporation is the change of liquid water into vapour and its movement away from the food. Both can occur during cooking and storage.
Chef’s tip: Assemble delicate crisp components as close to service as practical. For takeout, package sauces and wet ingredients separately when this helps preserve texture.
Key distinction: Moisture migration changes where water is located in or between components; it is not the same as total moisture loss through evaporation.
This term is one of hundreds covered in depth across OCS courses, learning paths, and 1-on-1 coaching with Chef Eric.
