Blueberry Crumble Bars
Blueberry Crumble Bars are a delightful treat that strikes the perfect balance between sweet and tart. With a buttery crumble layered over fresh blueberries, these bars offer a delightful texture that’s both satisfying and comforting. The aroma that wafts through your kitchen as they bake is simply irresistible, making them an excellent option for any gathering or just a cozy night in. Perfect for snacking, dessert, or even breakfast on the go, these bars will quickly become a family favorite.
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I first stumbled upon a recipe for these Blueberry Crumble Bars during a summer picnic when I realized I needed something easy to transport that wouldn’t compromise on flavor. The cool, sweet berries wrapped in a crumbly topping caught everyone’s attention, and soon enough, they were gone! Since then, I’ve perfected this recipe and am excited to share it with you. They are not only easy to make, but with minimal ingredients, they are budget-friendly too!
Why You’ll Love This Recipe
- Simple & Quick: Ready in no time—about an hour from prep to plate.
- Irresistible Flavor: The sweetness of blueberries paired with buttery crumble is a match made in heaven.
- Eye-Catching Appeal: Beautifully layered bars that look great on any dessert table.
- Flexible Serving: Perfect for breakfast, snack time, or a delightful dessert.
- Diet-Friendly Options: Easily adaptable for gluten-free diets with a flour substitute.
Ingredients You’ll Need
1 1/2 cups salted butter, softened: This forms the base of our crumb topping and provides richness. Consider using unsalted butter to control the salt level, but adapt by adjusting the added salt.
1 cup granulated sugar: This is essential for sweetness. You can substitute with coconut sugar for a different flavor profile.
2 teaspoons vanilla extract: Enhances the overall flavor. Always choose pure vanilla extract for the best results!
1/4 teaspoon salt: Balances the sweetness. If using unsalted butter, you may want to slightly increase this.
3 cups all-purpose flour: The backbone of your bars. For gluten-free options, use a 1:1 gluten-free baking blend.
1/4 cup granulated sugar: This will sweeten the blueberry filling. Feel free to use less if you prefer a less sweet flavor.
1 teaspoon cornstarch: Helps thicken the berry mixture. Arrowroot powder can be a good substitute.
4 cups fresh blueberries: The star of the show! If out of season, frozen berries will work; just ensure they are thawed and drained.
1 cup powdered sugar: For the optional drizzling icing that adds that special touch.
2 tablespoons milk: Needed for the icing. Any milk of your choice (dairy or non-dairy) will do!
How to Make Blueberry Crumble Bars
Preheat your oven: Begin by preheating your oven to 350℉. Line a 9×13 inch pan with parchment paper for easy removal.
Mix the base: In a large bowl or stand mixer, combine the 1 1/2 cups of softened butter, 1 cup of granulated sugar, 2 teaspoons of vanilla extract, and 1/4 teaspoon of salt. Mix until creamy.
Incorporate your flour: Gradually add in 3 cups of all-purpose flour until well combined. You’re looking for a dough that sticks together.
Press the mixture: Press about 2/3 of the crumb mixture into your prepared pan. Ensure it’s packed evenly and bake for 15 minutes, until slightly golden.
Prepare the berries: While the base is baking, combine 1/4 cup of granulated sugar with 1 teaspoon of cornstarch. Add in the 4 cups of fresh blueberries, tossing gently to coat.
Layer the blueberries: Remove the pan from the oven and spoon the blueberry mixture over the baked crust. Spread it evenly to ensure every bit gets that delicious sweet-tart taste.
Finish with crumbs: Crumble the remaining dough over the blueberry filling. This will create a beautiful topping.
Final bake: Return the pan to the oven and bake for an additional 30-35 minutes. Keep an eye out for a golden brown top and bubbling around the edges.
Make the icing (optional): While your bars are cooling, whisk together 1 cup of powdered sugar and 2 tablespoons of milk until you achieve a drizzling consistency.
Finish and enjoy: Once the bars are completely cool, drizzle the icing over the top, slice them up, and enjoy!
Storing & Reheating
To keep your Blueberry Crumble Bars fresh, store them in an airtight container at room temperature for up to three days. For longer storage, refrigerate them for about a week or freeze for up to three months. When ready to enjoy, you can thaw them overnight in the fridge and then warm them in the microwave for about 15-20 seconds. They may lose a bit of texture, but warming them up will bring back that lovely aroma!
Chef’s Helpful Tips
- To avoid a soggy bottom, let your base cool completely before adding the blueberry layer.
- Make sure to use room temperature butter; it mixes better and gives a fluffier texture.
- Adjust sugar levels based on the sweetness of your blueberries for perfectly balanced bars!
- If you use frozen berries, let them sit in a colander to drain excess moisture before adding.
- These bars can be made ahead of time for parties—just bake, cool, and cover until ready to serve!
Blueberry Crumble Bars bring sweetness and comfort to any dessert table. They’re layered with gorgeous blueberries balanced perfectly by a sweet crumbly topping that anyone would be happy to sink their teeth into. I encourage you to give this recipe a try—whether it’s a family gathering or a cozy snack for yourself, these bars won’t disappoint. Your friends and family will be begging for the recipe!

Recipe FAQs
Can I use frozen blueberries instead of fresh?
Absolutely! Frozen blueberries will work just as well in this recipe. Just make sure to thaw and drain them to prevent excess moisture from making the bottom soak through.
How do I know when the bars are done baking?
The bars are done when the edges have turned a golden brown and the blueberry filling is bubbling around the edges. A slight jiggle in the middle is okay, as it will set while cooling.
Can I make these bars gluten-free?
Yes! You can substitute the all-purpose flour with a 1:1 gluten-free baking blend. This will ensure you get a similar texture while accommodating gluten sensitivities.
How long can I store the Blueberry Crumble Bars?
You can keep these bars in an airtight container at room temperature for about three days, or refrigerate for up to a week. They also freeze beautifully for up to three months!
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📖 Recipe Card

Blueberry Crumble Bars
- Prep Time: 20 minutes
- Cook Time: 45 minutes
- Total Time: 1 hour 5 minutes
- Yield: 24 bars 1x
- Category: Desserts
- Method: Baking
- Cuisine: American
Description
Enjoy the mouthwatering Blueberry Crumble Bars, a delightful blend of fresh blueberries and buttery crumble, perfect for any occasion and easy to make at home!
Ingredients
- 1 1/2 cups salted butter, softened
- 1 cup sugar
- 2 teaspoons vanilla extract
- 1/4 teaspoon salt
- 3 cups all-purpose flour
- 1/4 cup sugar
- 1 teaspoon cornstarch
- 4 cups fresh blueberries
- 1 cup powdered sugar
- 2 tablespoons milk
Instructions
- Preheat the oven to 350℉ and line a 9×13 inch pan with parchment paper.
- In a large bowl or the bowl of a stand mixer, combine the butter, sugar, vanilla, and salt.
- Scrape down the sides of the bowl then stir in the flour.
- Press about 2/3 of the mixture into the prepared pan and bake for 15 minutes.
- Combine the sugar and cornstarch. Add the blueberries and stir to combine.
- Spoon the blueberry mixture over the bottom crust and gently spread to an even layer.
- Top with the remaining crumb mixture.
- Bake for an additional 30-35 minutes or until golden brown and bubbly.
- For the icing (optional), whisk together the powdered sugar and 2 tablespoons of milk. Add additional milk as needed to make a desirable drizzling consistency.
- Drizzle over the cooled bars and enjoy.
Notes
Ensure the butter is softened to room temperature for easy mixing.
Using fresh blueberries enhances the flavor and texture of the bars.
Let the bars cool before adding icing for the best presentation.
Nutrition
- Serving Size: 1 bar
- Calories: 250
- Sugar: 18g
- Sodium: 100mg
- Fat: 12g
- Saturated Fat: 7g
- Unsaturated Fat: 3g
- Trans Fat: 0g
- Carbohydrates: 35g
- Fiber: 2g
- Protein: 3g
- Cholesterol: 30mg
