how can I unpickle cherries they are tooo tart /
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These are pickled cherries? You can always balance tartness out with something sweet - sugar, honey, etc.
Try to convert to a rumtoft ... drain and rinse the cherries, put in a (clean) glass jar with a one part sugar / three parts rum. Let sit for a month then taste ... might be a nice sweet and sour taste with a hit of booze.Use medium dark rum, not white rum.
Another sweet and sour switch would be some kind of preserved chutney. Sounds good! (So does rumtoft.)
You can count the ingredients on one hand.
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