Blueberry Crumb Bars

Step 1

Preheat oven to 350F (175C) and lightly grease a 9x13 glass baking dish. Set aside.

Step 2

In small saucepan, combine 3 cups blueberries (505g), sugar, cornstarch, salt, and lemon juice over medium-low heat.

Step 3

Stir frequently until the blueberries release their juices, and the mixture is very liquidy (about 5-8 mins).

Step 4

Increase heat to medium-high and bring to a boil, stirring constantly.

Step 5

Boil (still stirring constantly) for 1 minutes and remove from heat. Add remaining 2 cups of blueberries, butter, and vanilla extract and stir until butter is melted.  Allow to cool while you prepare your crust.

Step 6

To prepare your cookie crust, combine flour, sugars, baking powder, cornstarch, and salt in a food processor and pulse briefly until combined.

Step 7

Sprinkle your butter pieces evenly over the dry ingredients and pulse until the mixture resembles coarse crumbs.

Step 8

Add egg and vanilla extract and pulse again until mixture just begins to cling together.

Step 9

Pour ½ of your cookie batter into the bottom of your prepared pan and use your hands or the back of a spoon to press evenly into the bottom of the pan to form a crust.

Step 10

Pour your cooled blueberry filling evenly over the crust.

Step 11

Use your hands to sprinkle the remaining crust mixture evenly over the top of the filling.

Step 12

Transfer to the oven and bake on 350F (175C) for 55-60 minutes or until the top of the blueberry crumb bars is golden brown.

Step 13

Allow to cool completely (2-3 hours) before slicing and serving. If you prefer to enjoy these warm the crumb bars WILL fall apart if sliced before they have cooled and set, so plan to use a spoon!