4 cups fresh or slightly thawed frozen blackberries
1/2 cup sugar
1/4 cup all-purpose flour
1 cup fat-free sour cream
3/4 cup sugar
2 teaspoons vanilla extract
3 tablespoon all-purpose flour
1/4 cup fine, dry bread crumbs
2 tablespoon sugar
Preheat oven to 375º. In a large bowl, lightly toss together the boysenberries, 1/2 cup sugar and 1/4 cup all purpose flour. Place this berry mixture in a 9 inch pie pan.
In a small bowl, stir together fat-free sour cream, the 3/4 cup sugar, vanilla extract and the 3 tablespoons flour. Spread the mixture evenly over the berries.
In a small bowl, stir together the bread crumbs and 2 tablespoons sugar. Sprinkle the bread crumb mixture on top of the sour cream mixture. Bake for 35-40 minutes, until bubbly and golden. Serve warm in bowls.