The process of preserving baked goods, specifically chocolate squares, for extended periods via sub-zero temperatures is a common practice. This technique involves lowering the internal temperature of the confection to inhibit microbial growth and enzymatic activity, thereby maintaining its quality. An example of this would be placing individually wrapped chocolate squares in a freezer-safe container and storing them at 0F (-18C).
Properly executed, this method offers several advantages, including minimizing waste of perishable food items and allowing for the preparation of desserts in advance. Its history is intertwined with the development of home refrigeration and the increasing desire for convenience in food storage and preparation. The ability to save food for a later time has increased food security and less waste.