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+ servings

Blueberry Crumble Bars

Yield: 16 bars
Prep Time:
10 mins
Cook Time:
35 mins
Total Time:
45 mins
Blueberry crumble bars are made with juicy blueberries and a butter crumble topping. It's a delicious summer dessert!
Blueberry Crumble Bars are filled with juicy blueberries and topped with a buttery crumble.
5 from 5 votes


Crust & Crumble Topping

  • 1 1/2 cups all-purpose flour
  • 1 1/2 cups old fashioned rolled oats
  • 3/4 cups light brown sugar
  • 1/2 teaspoon cinnamon
  • 1/2 teaspoon kosher salt
  • 1 cup cold butter ,cubed (2 sticks)

Blueberry Filling

  • 1/2 cup granulated sugar
  • 3 tablespoons cornstarch
  • 2 1/2 cups blueberries
  • 1 tablespoon lemon juice
  • 1 teaspoon lemon zest


Crust & Crumble Topping

  1. Line a 9×9 pan with parchment paper and coat with nonstick spray. Set aside.
  2. In a large bowl, whisk together flour, oars, brown sugar, cinnamon and salt. Add in the cold butter and using a pastry blender, cut the butter into the mixture until it resembles very coarse sand.
  3. Divide the mixture in half and press half into the bottom of the prepared pan to form the crust. Set aside both the pan and bowl with remaining mixture.


  1. In a large bowl, whisk together the granulated sugar and cornstarch. Add in the blueberries and coat in the sugar mixture. Add in the lemon juice and zest. Stir gently  to combine.
  2. Spread the blueberries on top of the crust. Sprinkle remaining crust mixture evenly on top of the blueberries and press lightly.
  3. Refrigerate the pan for 30 minutes.
  4. Preheat the oven to 350° F. Bake for 35 to 40 minutes until the fruit starts to bubble. Remove from oven and cool completely before cutting.


  • Use cold butter.
  • Let the bars cool completely. You can even chill them in the fridge to help them maintain their shape. If you eat them too warm, they will be messy. 
  • Store bars in a sealed container for up to 4 days.
Source: If You Give a Blonde a Kitchen

Nutrition Information

Calories: 255, Fat: 12g, Saturated Fat: 7g, Cholesterol: 30mg, Sodium: 177mg, Potassium: 74mg, Carbohydrates: 35g, Fiber: 1g, Sugar: 18g, Protein: 2g, Vitamin A: 365%, Vitamin C: 2.8%, Calcium: 19%, Iron: 1%

*Nutritional information is an estimate. Please consult a doctor or nutritionist for the most accurate nutritional info.

Course: Dessert
Cuisine: American
All images and text ©Spoonful of Flavor

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