Description
Make sliceable dessert bars featuring a buttery shortbread base, a tart lemon and sweet blueberry filling, and a crumbly streusel topping.
Ingredients
Scale
- 1 1/2 cups all-purpose flour
- 1/2 cup granulated sugar
- 1/4 teaspoon salt
- 1/2 cup (1 stick) cold unsalted butter, cut into pieces
- 1 large egg yolk
- 1 teaspoon vanilla extract
- 1 1/2 cups fresh or frozen blueberries
- 1/4 cup granulated sugar
- 2 tablespoons cornstarch
- 1/4 cup fresh lemon juice
- 1 tablespoon lemon zest
- 1 large egg white
- 1 cup all-purpose flour
- 1/2 cup packed light brown sugar
- 1/4 teaspoon salt
- 6 tablespoons cold unsalted butter, cut into small pieces
Instructions
- Preheat your oven to 350 degrees F. Line a 9×9 inch baking pan with parchment paper, leaving an overhang on two sides for easy removal.
- Prepare the crust: In a medium bowl, whisk together 1 1/2 cups flour, 1/2 cup sugar, and 1/4 teaspoon salt. Cut in 1/2 cup cold butter using a pastry blender or your fingers until the mixture resembles coarse crumbs.
- Mix in the egg yolk and vanilla extract until the dough just comes together. Press this mixture evenly into the bottom of the prepared pan. Bake the crust for 15 minutes.
- Prepare the filling while the crust bakes: In a separate bowl, gently toss the blueberries with 1/4 cup sugar, cornstarch, lemon juice, and lemon zest. Set aside.
- Prepare the streusel topping: In a small bowl, combine 1 cup flour, brown sugar, and 1/4 teaspoon salt. Cut in 6 tablespoons cold butter until crumbly. Stir in the egg white until just combined to form large crumbs.
- Remove the partially baked crust from the oven. Spread the blueberry mixture evenly over the warm crust.
- Sprinkle the streusel topping evenly over the blueberries.
- Bake for 35 to 40 minutes, or until the streusel is golden brown and the filling is bubbly.
- Let the bars cool completely in the pan on a wire rack, at least 2 hours, before lifting out using the parchment overhang and cutting into squares.
Notes
- If using frozen blueberries, do not thaw them before mixing with the filling ingredients.
- For cleaner slices, chill the cooled bars for 30 minutes before cutting.
- You can substitute lime juice and zest for a lime-blueberry variation.
- Prep Time: 20 min
- Cook Time: 55 min
- Category: Dessert
- Method: Baking
- Cuisine: American
Nutrition
- Serving Size: 1 bar
- Calories: 280
- Sugar: 20
- Sodium: 110
- Fat: 16
- Saturated Fat: 9
- Unsaturated Fat: 7
- Trans Fat: 0
- Carbohydrates: 33
- Fiber: 2
- Protein: 3
- Cholesterol: 45