Bean sprouts can be frozen as long as they are stored properly. A primary aspect of their appeal when they are used in food is their texture, specifically their crunch. In order for bean sprouts to retain their crunch, they must be free from freezer burn.
Preventing freezer burn means that the sprouts, despite the usual instructions to keep fresh sprouts crisp by adding water, should be as dry as possible before freezing. Freezer burn is caused by moisture present on food products when they are frozen. It is also very important that bean sprouts are stored properly because they can be a source of food-borne illnesses if they become contaminated by bacteria.