Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   1      cup           sugar
   1      cup           sour cream
   3      tablespoons   all purpose flour
     1/4  teaspoon      salt
  16      ounces        frozen blackberries thawed or
   4      cups          fresh blackberries
   9      inch          pie shell -- unbaked
     1/4  cup           fine dry bread crumbs -- (up to 1/2cup)
   2      tablespoons   sugar
   1      tablespoon    margarine or butter -- melted

Preparation:

Preheat oven to 375 degrees. Combine the sugar, sour cream, flour and salt. Place blackberries in the pie shell. Spread the sour cream mixture over top. In a small bowl, combine the bread crumbs, 2 tablespoons sugar, and margarine. Sprinkle the bread crumb mixture over the sour cream mixture. Bake at 375 degrees for 40 to 45 minutes or until done.