01 -
Place one 16-ounce mason jar or two 8-ounce jars on a clean kitchen towel right beside your stove. Have your jar lids and a ladle ready for easy access during the hot jam-making process.
02 -
In a medium saucepan over medium heat, gently combine your crushed strawberries with their juices, diced rhubarb, and fresh lemon juice. Whisk in the powdered pectin until well distributed, then bring the mixture to a rolling boil while stirring frequently to help break down the fruit pieces.
03 -
Once your fruit mixture is bubbling vigorously, pour in all the granulated sugar at once and stir thoroughly to incorporate. Bring everything back to a hard boil that can't be stirred down, then let it boil for exactly one minute while stirring constantly.
04 -
Remove your saucepan from heat immediately. Your jam should now be beautifully thickened and glossy, yet still flow easily from a spoon. If you notice any foam on the surface, simply skim it off with a clean spoon and discard.
05 -
Carefully ladle the hot jam into your prepared jars, leaving about 1/4 inch of space at the top. Wipe the jar rims clean with a damp towel, then loosely place the lids on top. Allow to cool completely at room temperature before transferring to your refrigerator for storage.