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Overhead view of jam in mason jar and saucepan scraped clean

Homemade Blueberry Jam with Rum

  • Author: Betty
  • Prep Time: 10 minutes
  • Cook Time: 10 minutes
  • Total Time: 20 minutes
  • Yield: 8 ounces 1x


Units Scale
  • 2 cups fresh or frozen blueberries
  • 3/4 cup granulated sugar
  • 1 Tbsp fresh lemon juice
  • 1 Tbsp rum


  1. Place berries, sugar, lemon juice, and rum into a medium saucepan.
  2. Cook over medium-high heat and allow the mixture to come to a boil.
  3. Immediately reduce the heat to medium. Cook for 10 minutes. Smash some of the berries with a potato masher about halfway through the cooking time.
  4. The liquid in the saucepan should start to thicken. Test the mixture if desired with a thermometer to see if it has reached 220 degrees F/104 C.
  5. Ladle the jam into clean pint-sized mason jars and let cool. Then, seal jars and store them in the refrigerator. Eat within 2 weeks.