Blueberry Crumb Bars

3 cups all-purpose flour
1/2 cup brown sugar
1/2 cup + 1/4 cup white sugar, divided
1 tsp baking powder
2 sticks of cold butter
1 egg, beaten
1 tsp of vanilla extract
1/4 tsp salt
Zest and juice of one lemon
4 cups fresh blueberries
4 tsp cornstarch

Preheat the oven to 375 degrees. Coat a 9 x 13 glass baking pan with cooking spray.

In a medium bowl whisk together flour, brown sugar, 1/2 cup white sugar, baking powder, salt and lemon zest. Use a fork or pastry cutter to cut in butter until mixture is in pieces no larger than a pea. Mix in egg and vanilla. Dough will be crumbly but will stick together when squeezed. Pat half of the dough into the pan.

In another small bowl, mix 1/4 cup white sugar, cornstarch and lemon juice. Add blueberries and gently toss them to coat. Pour blueberry mixture on top of the dough in pan. Then crumble remainder of dough evenly over the blueberries.

Bake in the oven for 45 to 60 minutes, or until the top is slightly browned. Cool completely, then cut into squares. Enjoy.