Ingredients

  • 16 ounces blackberries (fresh, frozen or canned)
  • 2 12 tablespoons cornstarch
  • 1 tablespoon lemon juice
  • 2 cups flour
  • 2 fluid ounces rolled oats
  • 1 cup brown sugar
  • 1 14 teaspoons baking powder
  • 34 teaspoon salt
  • 12 teaspoon allspice
  • 1 teaspoon cinnamon
  • 1 cup margarine

Method

  • Preheat oven to 400.
  • Grease a 13x9x2 pan.
  • Warm berries in a saucepan until the juices run.
  • Reserve 1 cup of the juice, adding water if needed.
  • Cook, stirring constantly until thickened.
  • Stir in the blackberries and set aside.
  • Combine all dry ingredients except margarine.
  • Then, cut in the margarine until crumbly.
  • Press 2/3 (about 4 cups) of the mixture into prepared pan.
  • Bake for 15 minutes.
  • Cool slightly.
  • Spread blackberry sauce over this crust.
  • Crumble remaining batter over this and press lightly.
  • Bake for another 20-25 minutes.