1. Toast can be kept for about two weeks. Frozen storage is the most effective way to prolong the shelf life of bread, and it can also lock the delicious taste of bread to the greatest extent. Although low temperature will accelerate the aging of starch, if it is below zero degrees Celsius, the aging effect of starch will begin to slow down.

2. When the toast bread is frozen, it needs to be put into a fresh-keeping bag, and the air in the fresh-keeping bag is squeezed out, and then the mouth of the bag is tied tightly and put into a refrigerating room for freezing.