Scale

3 cups all-purpose flour

1/2 cup granulated sugar

1/2 cup brown sugar

1 tsp. baking powder

1/4 tsp. salt

1 large egg

1 1/2 tsp. vanilla extract

1 cup unsalted butter, chilled and cut into cubes

1 Tbsp. cornstarch

1/2 cup granulated sugar

1 1/2 Tbsp. lemon juice

4 cups fresh blueberries

Cook Mode Prevent your screen from going dark

Preheat oven to 375 degrees F. Butter or Spray a 9×13-inch baking dish and set aside.

In a large mixing bowl whisk together flour, 1/2 cup granulated sugar, brown sugar, baking powder and salt.

In a small mixing bowl, whisk together egg and vanilla until combined.

Add egg mixture and cold butter cubes to flour mixture and using a fork or a pastry cutter, cut mixture together until it resembles coarse crumbs.

Press 1/2 of the mixture evenly into prepared baking dish.

In a separate mixing bowl, whisk together remaining 1/2 cup granulated sugar and cornstarch, stir in lemon juice.

Add blueberries then toss mixture to evenly coat, pour and spread coated blueberries evenly over crust in baking dish.

Sprinkle remaining crumb mixture over berry layer.

Bake in preheated oven about 38 – 42 minutes until top is golden brown.

Allow to cool for about 20 – 30 minutes before cutting into squares.

Store cooled bars in an airtight container in refrigerator (rewarm in microwave for 10 – 15 seconds if desired).