Blackberry Jam

2 ingredients
4 steps

Ingredients

  • 2 1/2 gal. blackberries
  • 10 lb. white sugar

Directions

  1. 1
    Cook down 1 1/2 hours to a greasy- looking skim.
  2. 2
    Add 1 c. vinegar.
  3. 3
    Cook 20 minutes more.
  4. 4
    Put in jars and seal.

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