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Delicious blueberry crumble bars topped with a crunchy oat topping.

Blueberry Crumble Bars

Deliciously sweet and tart blueberry crumble bars featuring a buttery, crumbly topping that is perfect for any occasion.
Prep Time 15 minutes
Cook Time 50 minutes
Total Time 1 hour 5 minutes
Course Dessert, Snack
Cuisine American
Servings 12 bars
Calories 220 kcal

Ingredients
  

For the crust and topping

  • 3 cups all-purpose flour
  • 1 cup granulated sugar
  • 1 teaspoon baking powder
  • 1/2 teaspoon salt
  • 1 cup cold unsalted butter, cubed Important for crumbly texture
  • 1 large egg, lightly beaten
  • 1/2 teaspoon vanilla extract

For the blueberry filling

  • 4 cups fresh blueberries Use fresh for best flavor; thaw if using frozen
  • 1/2 cup granulated sugar
  • 2 tablespoons cornstarch
  • 1 tablespoon lemon juice
  • 1 teaspoon lemon zest

Instructions
 

Preparation

  • Preheat your oven to 375°F and line a 9x13-inch baking pan with parchment paper.
  • In a large bowl, whisk together the flour, 1 cup sugar, baking powder, and salt.
  • Cut in the cold butter until the mixture resembles coarse crumbs.
  • Mix in the beaten egg and vanilla extract until the dough starts to clump together.
  • Press about 2/3 of the dough evenly into the bottom of the prepared pan for the crust.
  • Chill the crust in the freezer while you prepare the filling.

Preparing the Filling

  • In a separate bowl, combine the blueberries, 1/2 cup sugar, cornstarch, lemon juice, and lemon zest. Toss gently to coat the berries.
  • Spread the blueberry mixture evenly over the crust.
  • Crumble the remaining dough over the blueberry layer.

Baking

  • Bake for 45 to 50 minutes until the top is lightly golden brown and the filling bubbles around the edges.
  • Allow the bars to cool completely in the pan before lifting out using the parchment overhang and cutting into squares.
  • Serve and enjoy!

Notes

Chill the crust for best texture and allow bars to cool completely before cutting for clean edges.
Keyword baking, Blueberry Crumble Bars, Blueberry Recipes, dessert bars, easy dessert