In a large mixing bowl, combine the flour, 1 cup of sugar, baking powder, salt and pinch of cinnamon. Cut in the chilled butter until crumbly.
Add in beaten eggs and vanilla extract.
Press 2/3 of this mixture into a greased 9”x13” baking dish, reserving the remaining 1/3 of the dough for the topping.
In a small mixing bowl, combine the blueberries with the cornstarch and remaining sugar. Spread evenly over crust; sprinkle remaining dough on top of blueberries.
Bake at 350℉ 35-40 minutes, or until the edges begin to turn golden brown.
Cool pan on wire rack; once cool, combine powdered sugar and 1-2 teaspoons of water to make a drizzling consistency; drizzle on top of cooled bars and cut into squares when set. Store bars in refrigerator.
Notes
Ripe blueberries work best for this recipe, however you can sub frozen blueberries instead.
You can substitute the same amount of berries for the blueberries in this recipe (such as raspberries, strawberries or cherries).
Bars will keep in an airtight container 3-5 days in the refrigerator or up to 45 days in the freezer.