A Sweet and yummy recipe for blackberry bars, this is a delicious family favorite treat.
Preheat oven to 375 degrees and grease a 9×13 baking dish.
In a medium bowl, whisk together sugar, flour, and baking powder. Add salt and lemon zest.
Use a pastry cutter or fork to combine the butter and egg until it resemles coarse crumbs.
Place half of the dough into prepared pan, patting it down gently. Set the rest aside.
In another bowl, combine lemon juice, sugar, and cornstarch. Gently mix in the berries.
Sprinkle berry mixture over the crust, spreading it evenly.
Sprinkle the remaining crumble mixture over the berry layer.
Bake for 45-55 minutes, or until top is slightly brown.
Cool completely before cutting squares.