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A: Chopped or sliced onions can be stored in a sealed container in your refrigerator at the proper temperature of 40Â°F or below for 7 to 10 days (Source: USDA). For pre-cut fresh or frozen products, always use and follow manufactures use by dates.
Chopped raw mushrooms will last for about 1 to 2 days in the refrigerator. How long do mushrooms last in the fridge once they have been cooked? Cooked mushrooms will usually stay good for 3 to 5 days in the refrigerator and 10 to 12 months in the freezer. Can you freeze mushrooms?