How to properly store raisins

The correct storage methods for raisins mainly include sealing and moisture-proof, low temperature and light avoidance, classified storage, regular inspection, and clean environment.

1. Sealed and moisture-proof

Raisins have a high sugar content and are prone to moisture absorption and spoilage. They need to be stored in food grade sealed cans or vacuum bags. Glass jars are superior to plastic containers as they can prevent odors from penetrating. If using the original packaging bag, it is necessary to seal it with a clip and then cover it with a sealed bag. Food desiccants can be placed in damp areas, but avoid direct contact with raisins.

2. Low temperature and light avoidance

Temperatures exceeding 25 degrees Celsius can accelerate sugar analysis and mold growth. It is recommended to store in refrigeration. If long-term storage is required, it can be frozen. After thawing, the taste is slightly soft but does not affect consumption. Regardless of the storage method, it should be kept away from areas with strong sunlight such as stoves and balconies, as ultraviolet radiation can damage nutrients such as anthocyanins.

III. Classified Storage

Different varieties of raisins should be stored separately. Red raisins and green raisins have significant differences in moisture content and are prone to cross contamination when mixed. The mixed dried fruits with added nuts need to be stored separately, as the oxidation of nut oil can accelerate the spoilage of raisins. After opening, avoid mixing raisins with newly purchased products.

Fourth, Regular Inspection

Check the storage status at least once a month, focusing on observing whether there are lumps, white frost, or filamentous substances. Normal raisins have uniform frosting on the surface. If there are local crystals or mucus, they should be discarded immediately. Pay attention to changes in odor during inspection, as the fermented wine indicates the growth of mold.

Fifth, clean environment

The storage cabinet should be kept dry and ventilated, and bamboo charcoal bags can be placed to prevent moisture during the rainy season. Before storage, wipe the inner wall of the container with white vinegar to sterilize and avoid using cleaning agents with odors. During the high incidence season of pests, Sichuan pepper bags can be placed in the corners of the cabinet to repel insects, but they should not come into direct contact with raisins. As a high sugar food, raisins need to be stored in an environment with humidity below 60% during storage. It is recommended to reseal after each use and consume within two months after opening. It can be paired with oatmeal, yogurt and other ingredients to be divided into small portions, which is convenient to use and reduces the number of opening times. If surface oil stains or a crackling smell are found, it indicates that the fat has oxidized and deteriorated, making it inedible. In special climate areas, the method of vacuum sealing and tin foil wrapping can be used to extend the shelf life, but frozen storage is still the safest choice. When storing in daily life, pay attention to separating from seafood, dried goods, spices, and other strongly scented foods to avoid cross flavors that affect the flavor.