2 (0.3 oz) pkgs. Strawberry Jello
2 cups boiling water
1/2 cup cold water
2 cups fresh or frozen blackberries
1 cup chopped pecans
1 cup mini-marshmallows
Dissolve jello with 2 cups boiling water. Stir in cold water, blackberries, pecans and marshmallows. Pour into 9 x 9-inch square pan (marshmallows will automatically float to the top and stay there making a a nice topping), and chill several hours or until set. Keep stored in refrigerator.