Ingredients
2 cups fresh strawberries2 cups fresh raspberries2 cups fresh blackberries5-1/4 cups sugar2 tablespoons lemon juice1 package (1-3/4 ounces) powdered fruit pectin3/4 cup water
Preparation
In a food processor, process the berries in batches until finely chopped. Transfer to a large bowl. Stir in sugar and lemon juice. Let stand for 10 minutes, stirring occasionally.
In a small saucepan, combine fruit pectin and water. Bring to a boil; cook and stir for 1 minute. Add to fruit mixture; stir constantly until sugar is dissolved, 4-5 minutes.
Pour into jars or freezer containers, leaving 1/2-in. headspace. Cover and let stand overnight or until set, but not longer than 24 hours. Refrigerate for up to 3 weeks or freeze for up to 12 months.