TESTING JELL POINT
The first method is to take the temperature of boiling water, then cook the jelly mixture to a temperature 8 degrees F higher than your boiling point. The temperature to reach at sea level is 220 degrees F. At this point, enough liquid has evaporated from the juice mixture to concentrate the sugar, acid pectin and transform it into jelly.
The second method is to dip a cool metal spoon into the boiling liquid. Lift the spoon out and tip it so that the jelly runs off the side of the spoon. When the jelly falls in two drops and then flows together to form a sheet, it is ready.
Another test is to put a spoonful of jelly onto a cold plate and place it in the freezer for a few minutes. The mixture will set if the jell point has been reached. Remember to remove the kettle from the heat while you perform this test.
IMPORTANT INFORMATION ABOUT WATER BATHS
According to the USDA, ALL jams, jellies and preserves should be processed in a water bath for 10 minutes – NO LESS!
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