Ingredients

4 cups fresh or frozen blueberries2-1/2 cups fresh or frozen red raspberries2-1/2 cups fresh or frozen strawberries1/4 cup lemon juice2 packages (1-3/4 ounces each) powdered fruit pectin11 cups sugar

Preparation

Combine the berries and lemon juice in a stockpot; crush fruit slightly. Stir in pectin. Bring to a full rolling boil over high heat, stirring constantly. Stir in sugar; return to a full rolling boil. Boil 1 minute, stirring constantly.

Remove from the heat; skim off any foam. Carefully ladle hot mixture into hot pint jars, leaving 1/4-in. headspace. Remove air bubbles; wipe rims and adjust lids. Process for 10 minutes in a boiling-water canner.