Source: https://survivalfreedom.com/thicken-jam-with-gelatin/
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Recipe for refrigerator jam using gelatin as a thickener
INGREDIENTS:
Mixture A:
5 cups (830gm) prepared strawberries (washed , trimmed, and chopped)
1-1/2 cups sugar
1 tablespoon lemon juice
1 teaspoon vanilla extract
3 teaspoons unflavoured gelatin
STEPS:
1. Mix A. Bring to boil and stir constantly.
2. Reduce heat and cook over medium heat for 15 minutes, stirring frequently and skimming off foam.
3. Add vanilla and use a potato masher to mash the fruit to desired consistency.
4. Remove heat and stir in powdered gelatin, whisking until completely dissolved.
5. Pour into prepared jars, wipe jar rims and affix lids, and set on a towel to cool. Make sure you use high-quality jars.
6. Once the jam has cooled completely, place in the refrigerator, ready to use.
7. This jam will keep in the refrigerator for up to 4 months.
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Mixture A:
370gm prepared strawberries
1-1/2 cups sugar
Slightly less than 1/2 tablespoon lemon juice
1 teaspoon vanilla extract
1 and 1/4 teaspoons unflavoured gelatin
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Mixture A:
500gm passionfruit pulp
1-1/2 cups sugar
Slightly more than 1/2 tablespoon lemon juice
1 and 1/2 teaspoons unflavoured gelatin