Fresh ripe blueberries may spoil of left out at room temperature for a day or more, but they will keep for 2 or 3 days if stored without washing in a covered container in the refrigerator. Canned blueberries can be light or heavy syrup packed or water packed.Blueberries can be canned, mostly used for pie fillings, are cleaned and inspected, placed in cans, and the cans are then filled with water or with a 10-30% sugar solution to cover the head space.
The open cans are the exhausted or heated in free-flowing steam for 10 minutes, and finally sealed and heat process at about 93-95 °C with 25-30 minutes holding time.
The packing syrup from canned or frozen berries usually has picked up much of the color and flavor form the fruit. Hence, it may be used as a flavoring or a syrup for ice-cream sodas and sundaes, milk shake, mixed drinks, pancakes and waffles.
Compared with other fruits, canned blueberries are an excellent source of iron, fair sources of vitamin A, about average in protein fat and calcium and low in phosphorus.
Canned blueberries packed in water are low in calories and carbohydrates because they contain only about two-thirds the levels of the nutrients that are supplied by the raw fruit.
Process and uses of canned blueberries
