How To Make Blueberry Jam

Blueberry Jam Recipe

Yield: ~3 cups (about 3 half-pint jars)

Ingredients

• 4 cups fresh or frozen blueberries (about 2 pints or 600g)

• 1 ½ cups granulated sugar

• 1 tablespoon lemon juice (fresh preferred)

• ½ teaspoon lemon zest (optional, enhances flavor)

• 1 pinch salt

Equipment Needed

• Medium saucepan (heavy-bottomed)

• Potato masher or fork

• Measuring cups & spoons

• Wooden spoon or silicone spatula

• Sterilized jars with lids (if storing long-term)

• Candy or instant-read thermometer (optional but helpful)

Preparation Time

• Prep: 10 minutes

• Cook: 20–30 minutes

• Total: ~40 minutes

Instructions

1. Prepare the Blueberries
   Rinse blueberries and remove stems. If you prefer a smoother jam, lightly mash them in the pot with a potato masher. For chunkier jam, mash less.

2. Combine Ingredients
   In a medium saucepan, add:

   • mashed blueberries

   • sugar

   • lemon juice

   • lemon zest (if using)

   • pinch of salt

3. Cook the Jam
   Heat over medium heat, stirring often until the sugar dissolves.
   Continue simmering, stirring occasionally, until the mixture thickens.

   • This usually takes 20–30 minutes.

   • If using a thermometer, it should reach 220°F (104°C) for proper gel consistency.

4. Test the Thickness
   Place a small spoonful on a cold plate and let sit for 30 seconds.
   Run your finger through it—if it leaves a clear line, it’s ready.

5. Jar the Jam
   Remove from heat. Spoon into clean, hot jars and seal with lids.

   • Store in the refrigerator for up to 3 weeks, or

   • Process in a boiling water bath for 10 minutes to store shelf-stable for up to 1 year.

Nutritional Information (per tablespoon)

(Approximate)

Tips & Variations

• For a lower-sugar version, reduce sugar to 1 cup and cook longer.

• Add a cinnamon stick while simmering for warming flavor.

• Mix berries (blueberry + raspberry or blackberry) for a blended jam.