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blueberry rhubarb jam

Blueberry Rhubarb Jam

This delightful no pectin Blueberry Rhubarb Jam contains just 4 simple ingredients and is the perfect way to preserve the season!
4.88 from 57 votes
Prep Time 5 minutes
Cook Time 30 minutes
Total Time 35 minutes
Course Condiment
Cuisine American
Servings 5 half pint jars

Equipment

  • Cutting board and knife
  • Large pot or Jam pan
  • Potato masher
  • Water bath canning equipment optional *see notes above*

Ingredients
  

  • 4 cups blueberries, washed
  • 4 cups rhubarb, washed and cut into ¼th inch slices
  • 4 cups white granulated sugar
  • 1 lemon, zest and juice

Instructions
 

  • In a large pot or jam pan combine blueberries and sliced rhubarb with the zest and juice of one lemon.
    Cook over medium high for 5-10 minutes until the fruit has softened. Then use a potato masher to gently mash the fruit.
    Add in sugar, then continue to boil the jam over medium high to high heat for an additional 20-25 minutes until it has reached the gelling stage. *See Recipe FAQ above for how to tell if jam is set*. Be sure to stir constantly once the jam has reached a boil to prevent the bottom from scorching.
    Once the jam has thickened you can remove the pan from the heat.
    At this point you can either spoon the jam into jars and place them in the fridge or can them using the instructions below

Water Bath Canning Instructions

  • Ladle the jam into mason jars leaving about ¼th to ?rd inch of headspace.
    Remove air bubbles and wipe the jar rims.
    Place on new, clean lids and bands and process in a boiling water bath for 10 minutes (adjusting time for altitude).
    Turn off the heat and allow the jars to rest in the warm water for 5 minutes before removing and placing on a towel on the counter (do not place directly on the counter).
    Allow the jars to cool undisturbed for about 24 hours until all the lids have sealed.
    Store sealed jars in a cool dry place for 12-18 months for best quality.
    *Note* If any of the jars do not seal simply store in the refrigerator and consume within 10-14 days.
Keyword canning, Jam
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