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Homemade blackberry jam in a jar with fresh blackberries

Blackberry Jam – Sweet, Tangy, and Homemade Goodness

A luscious homemade blackberry jam made with fresh berries, sugar, and a hint of lemon. This easy recipe delivers a sweet and tangy spread perfect for toast, pastries, or desserts.
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Prep Time 15 minutes
Cook Time 25 minutes
Total Time 40 minutes
Course Breakfast, Condiment, Dessert
Cuisine American, Traditional Preserves
Servings 4 half-pint jars (about 32 servings)
Calories 50 kcal

Equipment

  • Large heavy-bottomed pot
  • Wooden spoon
  • Candy thermometer
  • Jars and lids
  • Potato masher or sieve

Ingredients
  

  • 4 cups fresh blackberries (or thawed frozen)
  • 3 cups granulated sugar
  • 2 tbsp lemon juice
  • 1 packet powdered pectin (optional, for firmer set)

Instructions
 

  • Prepare Berries: Rinse blackberries and remove stems. Toss with sugar to draw out juices.
  • Cook with Sugar & Acid: Place berries, sugar, and lemon juice in a pot. Mash lightly and simmer until juices release.
  • Add Pectin & Boil: Stir in pectin if using. Bring to a rolling boil, stirring constantly, until jam thickens and reaches 220°F.
  • Test Consistency: Place a spoonful on a chilled plate. If it wrinkles when pushed, it’s ready.
  • Jar & Seal: Pour hot jam into sterilized jars. Wipe rims, seal, and process in boiling water bath for 10 minutes.
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