For the Blackberry Crumble Bars

• Preheat oven to 375°F. Spray 9x9-inch baking dish with nonstick cooking spray. 
• In a medium bowl, whisk together the flour, ½ cup sugar, baking powder and salt. 
• Cut in the butter using a pastry cutter to form pea-sized pieces. 
• Stir in the beaten egg with a fork, just until dough begins to form a ball. 
• Press half of the mixture into the bottom of prepared pan. 
• In another medium bowl, toss blackberries gently with lemon juice, cornstarch and remaining ½ cup sugar. 
• Scatter the sugared berries over the crust in the pan and sprinkle remaining half of dough over berries. 
• Bake for 35-39 minutes, or until lightly browned. Cool completely and cut into bars. 
• Love berries? Try these other Berry Recipes.