Ingredients
1
lb blackberries (4 cups)
2
tbsp powdered fruit pectin
Directions
1.
Mash blackberries with a potato masher or a fork in a large bowl.
2.
Stir together berries, sugar, pectin, and lemon juice in a 12-inch nonstick skillet, then boil, stirring occasionally, until slightly thickened, about 7 minutes. Transfer jam to a large shallow bowl and chill, its surface covered with wax paper, until softly set, at least 30 minutes. (Jam will set further if chilled longer.)
4.
Jam keeps, chilled in an airtight container, 2 weeks.