Ingredients
4 cups fresh or frozen blueberries
1 ½ cups granulated sugar
1 lemon , zested and juiced
Pinch salt
Instructions
In a medium saucepan, stir together 4 cups blueberries, 1 1/2 cups sugar, lemon zest, lemon juice, and pinch of salt over medium heat. Stirring frequently, bring to a boil.
Reduce heat to medium. Simmer, stirring occasionally while gently crushing some of the blueberries, 7 to 10 minutes, or until slightly thickened and a digital thermometer reads 220°F.
Let cool 5 minutes in the saucepan before transferring to jars. Leave unopened and let come to room temperature. Once the jam is at room temperature, seal jars and store in the refrigerator. The jam might take 24 to 48 hours to fully set up, but it can be eaten immediately.
Notes
Berries: We’ve had success using this recipe for blackberries or raspberries as well.
Freezer jam: Transfer the jam to the jars or freezer bags, leaving room for jam to expand as it freezes. Store in the freezer up to 1 year. Thaw overnight in the fridge before eating.
Storage: The jam is best eaten within 10 days. If unopened, the jam can last up to 1 month.
