Description

This Best Homemade Blackberry Jam recipe is a luscious, easy-to-make fruit preserve bursting with fresh blackberry flavor. Using simple ingredients like fresh blackberries, sugar, and lemon juice, this jam is perfectly sweetened and naturally tangy. Optional fruit pectin ensures a thicker consistency, while a stovetop cooking method makes it accessible for all home cooks. Ideal for spreading on toast, topping desserts, or gifting in jars, this vibrant jam captures the essence of summer berries.

Ingredients

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Jam Ingredients

4 cups fresh blackberries, rinsed
2 cups granulated sugar
2 tablespoons lemon juice
1 tablespoon lemon zest (optional)
1 packet (1.75 oz) fruit pectin (optional, for thicker jam)

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Instructions

Prepare the Berries: In a large saucepan over medium heat, combine the fresh blackberries and lemon juice. Use a potato masher or the back of a spoon to gently mash the berries, releasing their natural juices.
Add Sugar and Zest: Stir in the granulated sugar and optional lemon zest into the mashed berries. Bring the mixture to a gentle boil, stirring frequently to dissolve the sugar evenly.
Incorporate Pectin if Using: If adding fruit pectin to achieve thicker jam, add it now following the packet instructions. Continue boiling the mixture for 1–2 minutes, stirring constantly to prevent burning.
Simmer the Jam: Reduce the heat slightly to maintain a simmer, cooking for 10–15 minutes. Stir frequently until the jam thickens to your desired consistency.
Test Jam Thickness: To check if the jam is ready, place a spoonful on a cold plate. If the jam wrinkles when you push it with your finger, it’s done.
Cool and Jar: Remove the saucepan from heat and allow the jam to cool slightly. Pour the jam into sterilized jars and seal tightly.
Store Properly: Refrigerate the jam for up to 3 weeks or process the jars in a water bath for longer shelf life and room temperature storage.

Notes

For a seedless jam, strain the mashed berries through a fine mesh sieve before cooking.
This recipe can be doubled, but the cooking time may need to be extended slightly to achieve proper thickness.
Use sterilized jars and follow safe canning practices if opting for long-term storage.