Blackberry Jelly

Ingredients
- almost 4 c blackberry juice
- 5 c sugar
- 1 box pectin
- 1 Tbsp butter
Directions
- Measure out sugar and set aside
- Measure juice and put into dishpan
- Add pectin and butter
- Bring to boil stirring frequently
- Add sugar stirring frequently and bring to a rolling boil
- Boil for 1 minute
- Skim off foam if necessary
- Add to hot sterilized jars
- Wipe rims of jars after adding liquid place flats on and screw on lids tightly
- Invert jars for 30 minutes and then turn upright making sure jars are not touching and are not in a draft