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Master Gardener Education Program Assistant, Master Food Preserver Education Program Assistant
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Associate Professor of Practice
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I had a jam apocalypse, what happened?

Q: I made uncooked freezer jam from blackberries in my yard. I put the prepared jam in jars, placed lids but not too tight with 1/2 headspace. After letting them sit on the counter for 24 hrs ( for the pectin to set) the jam was seeping out of the lids and when I unscrewed the lid the jam almost popped out like an oozing volcano. No odor and I foolishly tasted...

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