Blackberry Freezer Jam

3 cups crushed berries
5 1/4 cups sugar
1/3 cup (rounded) Dutch Jell or Sure Jell

In a large bowl, measure blackberries, mix with sugar, and set aside. Mix Dutch-Jell or Sure Jell with 3/4 cup water and bring to a boil while stirring constantly. Pour the mixture over the fruit and stir for 3 minutes. Pour jam into clean 1-2 cup sanitary freezer containers. Keep frozen until you are ready to use the jam.