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When baking, the blackberries’ juices spread and turn thick and jammy to fill in any blank patches between berries when first placed on the crust.
Preheat oven to 350°. Coat 9- x 13-inch baking pan with cooking spray, line with parchment paper, then coat paper with cooking spray.
Combine flour, 3⁄4 cup cane sugar, 1⁄4 cup brown sugar, baking powder, and salt in bowl. Blend in margarine and 2 Tbs. water with fingers until mixture is crumbly. Press 3⁄4 mixture in bottom of prepared baking pan.
Work remaining 2 Tbs. brown sugar and cinnamon into remaining mixture. Set aside.
Toss together blackberries, starch, vanilla, and remaining 2 Tbs. cane sugar in bowl. Spread mixture over dough. Sprinkle dough crumbles over berries. Bake 50 minutes, or until golden brown. Cool. Remove from pan, and cut into squares.
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- Serving Size 1 bar
- Calories 263
- Carbohydrate Content 35 g
- Cholesterol Content 0 mg
- Fat Content 13 g
- Fiber Content 3 g
- Protein Content 3 g
- Saturated Fat Content 5 g
- Sodium Content 172 mg
- Sugar Content 16 g