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–+ servings
Three jars of jam and a basket of blueberries.

Blueberry Vanilla Jam

Angie Zoobkoff
When it comes to homemade jam, summer blueberries, vanilla, and cardamom are a match made in heaven.
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Prep Time 15 minutes
Cook Time 35 minutes
Total Time 50 minutes
Course condiment
Cuisine American
Servings 4 half-pint jars
Calories 44 kcal

Equipment

Ingredients
  

  • 6 cups fresh blueberries (about 2 pounds | 900 g)
  • 3 cups granulated sugar (600 g)
  • ¼ cup lemon juice
  • 2 teaspoons ground cardamom
  • 1 ½ teaspoons vanilla extract

Instructions
 

  • Sanitize 4 half-pint jars. Prepare your canner according to manufacturer's instructions. Place a small plate in the freezer.
  • Combine the blueberries, sugar, and lemon juice in a large pot. Mash until the blueberries begin to release some juices and the sugar begins to dissolve.
  • Bring to a boil over high heat, then reduce heat to maintain a steady simmer. Cook until the jam is thick and the temperature reaches 220°F (104°C), adjusting for altitude if needed (see note below), 25 to 30 minutes. Check for set using the cold plate test.
  • Stir in the vanilla and cardamom.
  • Ladle the jam into the jars, leaving ½-inch (12-mm) headspace. Wipe the rims clean, top with lids, then screw the bands on until fingertip tight.
  • Process the jam in a boiling water bath for 10 minutes, adjusting for elevation if needed.
  • Remove from the canner and cool at room temperature for 24 hours before moving to a cool, dark location for up to 1 year. Once opened, refrigerate and use within 4 weeks.

Notes

  • Patience is key–Because this is a no-pectin jam, it will require a significant amount of boiling time to reach set. Expect to be monitoring it for 30 to 40 minutes.
  • Adjust for elevation–Use a candy thermometer or the cold plate test to determine when your jam is set. If you’re using a thermometer, you’re aiming for a temperature of 220°F (104°C). If you are at elevation, subtract 2°F for every 1000 feet above sea level. Adjust the water bath processing time for elevation by adding 5 minutes for every 3000 feet above sea level. (For 1000 to 3000 feet, add 5 minutes, 3001-6000, add 10 minutes, and so on).
  • Dietary–This recipe is suitable for gluten-free, dairy-free, and vegan diets.

Nutrition

Serving: 1 tablespoonCalories: 44kcalCarbohydrates: 11gSugar: 11g
Keyword homemade jam, jams and jellies, no-pectin jam, preserving
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