We make this delicious blackberry jam recipe every summer after we've picked a ton of fresh blackberries.
Ingredients
- blackberries: 4 cups
- white sugar: 1 cup
- cornstarch: 2 Tbsp
- ground cinnamon: 0.25 tsp
- ground allspice: 0.25 tsp
- lemon juice: 0.5 tsp
Metric Conversion
Stages of cooking
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Mash blackberries in a saucepan with a potato masher. Stir in sugar until juices form. Remove 1 tablespoon blackberry juice from the saucepan; mix with cornstarch in a small bowl. Stir cornstarch mixture back into the saucepan.
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Bring blackberries to a boil. Once boiling, cook, stirring often, until jam has thickened, about 15 minutes. Stir in cinnamon and allspice.
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Remove from the heat and allow to cool, 30 to 45 minutes. Transfer jam to a bowl, cover, and refrigerate until chilled. Stir in lemon juice before serving.
