Blackberry Jelly

Directions

1. 1
   Measure out sugar and set aside.
2. 2
   Measure juice and put into dishpan.
3. 3
   Add pectin and butter.
4. 4
   Bring to boil, stirring frequently.
5. 5
   Add sugar, stirring frequently, and bring to a rolling boil.
6. 6
   Boil for 1 minute.
7. 7
   Skim off foam, if necessary.
8. 8
   Add to hot, sterilized jars.
9. 9
   Wipe rims of jars after adding liquid; place flats on and screw on lids tightly.
10. 10
    Invert jars for 30 minutes and then turn upright, making sure jars are not touching and are not in a draft.