I make it when the local grocery has ripe bananas at a big discount. Can it like you would any jam and it keeps a long, long time.
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Reduce heat and simmer for 15 minutes, stirring frequently, until thickened. Remove from heat and ladle into sterilized pint canning jars.
Store in refrigerator for up to 2 weeks. Or usa a water bath canning procedure and seal jars. Then they will keep for at least 1 year.