Go Back
Blueberry Crumble Bars

Blueberry Crumble Bars

Delicious blueberry crumble bars are easy to prepare. Perfect for breakfast or snacking. Buttery cinnamon crumble with a lemon blueberry layer.
Prep Time 15 mins
Cook Time 45 mins
Total Time 1 hr
Course Dessert
Cuisine American
Servings 9


Blueberry Filling:

  • 5 grams cornstarch (2 teaspoons)
  • 6 grams fresh lemon zest (1 tablespoon)
  • 15 grams fresh squeezed lemon juice (1 tablespoon)
  • 36 grams light brown sugar (3 tablespoons)
  • 330 grams fresh blueberries (2 cups)


  • 162 grams all-purpose flour (1-1/4 cups)
  • 100 grams granulated sugar (1/2 cup)
  • 3 grams baking powder (1/2 teaspoon)
  • 3 grams ground cinnamon (1/2 teaspoon)
  • 113 grams unsalted butter (1/2 cup OR 1 stick), cold + cubed
  • 12 grams light brown sugar (1 tablespoon)
  • 12 grams granulated sugar (1 tablespoon)


  • Preheat the oven to 350 degrees F.
  • Line an 8 x 8-inch baking pan on the bottom and two opposite sides with parchment paper.

Blueberry Filling:

  • Add cornstarch, fresh lemon zest, fresh lemon juice, and light brown sugar to small bowl. Stir to combine. Add blueberries. Toss to coat. Set aside.


  • Add all-purpose flour, granulated sugar, and baking powder to a medium mixing bowl. Whisk to combine.
  • Using a pastry blender, cut in the cold butter until crumbly in texture.
  • Divide the mixture into 2 parts, 2/3 + 1/3. Press 2/3 of the mixture into the bottom of the prepared pan. Use a small offset spatula to ensure the mixture is evenly spread across the bottom of the prepared pan.
  • Pour the blueberry mixture over the crumble layer in the baking pan.
  • Add light brown sugar and granulated sugar to remaining crumble mixture.
  • Sprinkle the remaining crumble mixture over the blueberry filling.
  • Bake in preheated oven for 45 to 50 minutes or until the blueberry filling is bubbly and the crumble topping is golden brown.
  • Remove from oven and place pan on wire rack. Cool to room temperature.
  • Lift the bars from the baking pan using the parchment paper overhang. Slice into individual bars.
Keyword blueberries, blueberry crumble, blueberry crumble bars, brunch, dessert bars