5 half pints

How to Make It

Step 1

Combine blueberries and sugar in a flat-bottomed kettle; cook over low heat, stirring until sugar dissolves. Bring to a rolling boil, stirring constantly, until mixture registers 220° on a candy thermometer or until mixture sheets from a cold metal spoon. Remove from heat; skim off foam.

Step 2

Quickly ladle jam into hot sterilized jars, leaving 1/4-inch headspace. Cover at once with metal lids, and screw bands tight. Process jam in boiling water bath 10 minutes.

Step 3

Note: Blackberries may be substituted for blueberries. If seedless jam is preferred, crushed blackberries may be heated until soft and pressed through a sieve or food mill; add sugar, and proceed as directed.

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Ratings & Reviews

Marceliam's Review

July 10, 2014