Wash strawberries and remove the stems.
Puree the strawberries in a food processor, crush with a potato masher OR use an emersion blender.
8 Cups Strawberries
Measure out 5 cups crushed strawberries and place in a large sauce pan.
Stir in 1 package of Sure Jell original and ½ a teaspoon butter. The butter will help reduce the foam.
1 package Sure Jell Original, ½ Teaspoon Butter
If using lemon rinds for thicker jam, now is the time to toss in the lemon rinds and stir to dissolve the powdered pectin.
lemon rind
Bring the mixture to a full rolling boil that will not stop when stirred.
Boil for 1 minute.
Add 7 cups of sugar and return to the rolling boil.
7 Cups Sugar
Boil for exactly 1 minute, stirring the entire time.
Remove from heat and skim off any foam with a metal or wooden spoon.
Remove lemon rind
Ladle jam into containers using a canning funnel, filling to within ¼ inch of the top. Wipe jar rims clean.
Add a NEW, clean lid and ring. Finger tighten. For shelf-stable jam, follow the Hot Water Bath Canning Instructions in the Notes section. For refrigerator jam, skip to Step 15.
Process in a hot water bath for 15 minutes. Remove from the water and allow to cool completely.
Allow to cool to room temperature before refrigerating. Use within 3 weeks.