Wash and dry the mason glass jars or freezer-friendly plastic containers with covers. Set aside.
Wash the strawberries. Remove the hull and stems from the strawberries and discard.
In a large bowl, mash strawberries with a potato masher.
In another large bowl, add the sugar. Do not change the amount of sugar in the recipe. Any less and the jam will not set.
Next, add the crushed strawberries to the sugar. Stir. Let stand for 10 minutes, stirring occasionally.
Add the water and the Sure-Jell packet of pectin to a small saucepan. Over medium heat, bring this mixture to a boil, stirring constantly. Allow the mixture to boil for 1 minute. Remove from heat.
After 10 minutes, add the saucepan Sure-Jell mixture to the fruit sugar mixture. Stir constantly for 3 minutes. This will dissolve the sugar and create the jam. It is okay if a few sugar crystals remain.
Using a ladle and a wide funnel, fill the jars immediately. Leave at least ½ inch space on the top because the jam will expand during freezing. Add the covers and set aside.
Let the covered jam containers stand at room temperature for 24 hours. Then refrigerate for up to three weeks or freeze for up to 1 year.
If frozen, thaw in refrigerator before using.
Notes
Note 1: Use the Sure-Jell in the yellow box with this recipe to ensure success. If the Sure-Jell box you purchased has the letters "MCP," it will not work for this recipe; you need to use the recipe for strawberry jam with MCP. If you want to use liquid pectin (Certo), you will need this recipe for strawberry jam with Certo. Storage Notes:Refrigeration: Keep in the refrigerator for three weeks.Freezer: Keeps in the freezer for one year. Defrost before using.Low Sugar Strawberry Freezer Jam Recipe:It's a strawberry jam recipe with less sugar using the pink Sure-Jell box.