I got this recipe out of a magazine years and years ago. It's the only one I make and may I add, do not stray from it! Tell me if it worked for you and what you thought of it.
Strawberry Jam From Frozen Fruit
8 cups whole unsweetened frozen strawberrries
1 box of light pectin crystals (warning: DO NOT SUBSTITUTE THIS FOR ANY OTHER KIND!! trust me!)
4 1/2 cups of sugar
Thaw berries until just a few ice crystals remain. Drain, reserving juice; crush fruit. Combine fruit and juice to make 6 cups. Pour into heavy saucepan. Mix pectin with 1/4 cup of the sugar and stir into fruit. Bring to full rolling boil over high heat, stirring constantly. Add remaining sugar (4 1/4 cups). Return to full rolling boil, stirring. Boil hard for 1 minute stirring constantly. Remove from heat. Stir and skim off any foam for 5 minutes.
Meanwhile, boil lids for 5 minutes. Fill sterilized jars (8- 1 cup jars or 4- 2 cup jars), leaving 1/4 inch headspace. Wipe rims if necessary. Seal with prepared lids, screw on bands fingertip tight. Process in boiling water bath canner for 5 minutes. Remove and let cool on rack for 24 hours, inverting jars several times to distribute fruit. Check seal, wipe jars and store in cool dark dry place.
I have also used raspberries for this recipe and they turned out great! Let me know if you try it and what you think of it.
Enjoy your day!