Blueberry Streusel Bars are the perfect combination of sweet, tart, and crunchy. With a buttery base that cradles a luscious blueberry filling, these bars are topped with a crumbly streusel that adds texture and flavor. They are simple to make and are perfect for any occasion, whether it’s a summer picnic or a cozy dessert at home. Once you take a bite of these delightful bars, you’ll understand why they’re a favorite among fruit dessert lovers.
What Sets This Recipe Apart

What truly differentiates these Blueberry Streusel Bars from others is the balance of flavors and textures. The tangy blueberries are complemented by the sweetness of the streusel topping, creating a delightful contrast. Additionally, the use of cold butter in the crust ensures a flaky, tender base that holds up beautifully against the juicy filling. This recipe is also versatile, allowing you to experiment with different fruits or spices, making it a staple in any baker’s repertoire.
What to Buy

To make these scrumptious Blueberry Streusel Bars, you’ll need a few key ingredients:
- Flour: Use all-purpose flour for the base and streusel topping.
- Powdered Sugar: This sweetener adds a delicate sweetness to the crust and streusel.
- Salt: A dash of salt enhances the flavors in the dessert.
- Butter: Use cold, unsalted butter for the best results.
- Blueberries: Fresh or frozen blueberries work well; just make sure they are ripe and sweet.
Appliances & Accessories

Before diving into the recipe, gather the following essentials:
- Baking Dish: A 9×9 inch square baking dish is ideal for these bars.
- Mixing Bowls: You’ll need a couple of sizes for mixing the crust and filling.
- Whisk or Fork: For combining the dry ingredients and cutting the butter.
- Spatula: Perfect for spreading the blueberry filling and topping evenly.
Method: Blueberry Streusel Bars
Step 1: Preheat the Oven
Start by preheating your oven to 350°F (175°C). This ensures that your bars bake evenly and develop a golden crust.
Step 2: Prepare the Baking Dish
Grease your 9×9 inch baking dish lightly with butter or line it with parchment paper for easy removal later.
Step 3: Make the Crust
In a mixing bowl, combine _ cup flour, _ cup powdered sugar, and a dash of salt. Add the cold butter pieces. Using a fork or pastry cutter, mix until the mixture resembles coarse crumbs. Press this mixture firmly into the bottom of the prepared baking dish to form an even layer.
Step 4: Prepare the Blueberry Filling
In another bowl, gently mix your blueberries with a bit of sugar and a teaspoon of lemon juice to enhance their flavor. If you prefer, you can also add a sprinkle of cornstarch to thicken the filling slightly.
Step 5: Assemble the Bars
Spread the blueberry mixture evenly over the crust.
Step 6: Make the Streusel Topping
Using the same bowl used for the crust, combine another _ cup flour, _ cup powdered sugar, and the remaining cold butter. Mix until crumbly. Sprinkle this streusel topping generously over the blueberry layer.
Step 7: Bake
Place the baking dish in the preheated oven and bake for 30-35 minutes, or until the topping is lightly golden and the blueberries are bubbling.
Step 8: Cool and Cut
Remove the pan from the oven and allow the bars to cool completely in the baking dish. Once cooled, cut into squares and serve!
In-Season Swaps
If blueberries aren’t in season or you’re looking to switch things up, consider these alternatives:
- Raspberries: Tart and sweet, they add a beautiful color.
- Peaches: Fresh peaches bring a juicy, summery flavor.
- Cherries: Sweet or tart cherries can elevate this dessert.
- Apples: For a fall twist, use diced apples with cinnamon.
Pro Perspective
When making Blueberry Streusel Bars, remember these tips:
- Ensure your butter is really cold; this is key for a flaky crust.
- Don’t overmix the streusel; you want it to be crumbly, not a paste.
- Feel free to adjust the sweetness based on your taste. If your blueberries are particularly sweet, you may want to reduce the sugar.
- Let the bars cool completely for the best cutting results; they’ll hold their shape better.
Refrigerate, Freeze, Reheat
These Blueberry Streusel Bars can be stored and enjoyed later:
To refrigerate, simply cover the bars with plastic wrap or store them in an airtight container for up to a week. If you want to freeze them, wrap individual squares in plastic wrap and then place them in a freezer bag. They can last up to three months in the freezer. To reheat, simply thaw in the fridge overnight and warm in the microwave or enjoy cold!
Troubleshooting Q&A
What if my bars are too crumbly?
If your bars are too crumbly, it might be that too much flour was used or the butter wasn’t mixed in properly. Ensure the butter is cold and cut into small pieces, and measure your ingredients accurately for the best results.
Can I use frozen blueberries instead of fresh?
Yes! Frozen blueberries work perfectly in this recipe. Just toss them in a bit of flour before mixing them into the filling to prevent them from sinking to the bottom.
How do I know when my bars are done baking?
Look for a light golden color on the streusel topping and bubbling from the blueberry filling. A toothpick inserted into the center should come out clean or with a few moist crumbs.
Can I make these bars gluten-free?
Absolutely! Substitute the all-purpose flour with a gluten-free flour blend. Just ensure the blend has a binding agent to help the bars hold together.
If you’re looking to complement your Blueberry Streusel Bars with more delicious treats, consider trying:
The Last Word
Blueberry Streusel Bars are not just a delightful treat; they are a celebration of flavors that highlight the beauty of simple baking. With their buttery crust, juicy filling, and crumbly topping, these bars are sure to impress anyone who takes a bite. They are perfect for sharing, but let’s be honest, you might just want to keep them all to yourself! Enjoy baking these bars and the smiles they bring to your table.

Blueberry Streusel Bars
Ingredients
For the Crust:
- 1 cup Flour all-purpose
- 0.5 cup Powdered Sugar
- 1 pinch Salt
- 0.5 cup Butter cold, unsalted, cut into pieces
For the Filling:
- 2 cups Blueberries fresh or frozen
- 1 tablespoon Sugar for mixing with blueberries
- 1 teaspoon Lemon Juice
For the Streusel Topping:
- 0.5 cup Flour for topping
- 0.5 cup Powdered Sugar for topping
- 0.5 cup Butter cold, cut into pieces
Instructions
Instructions:
- Step 1: Preheat your oven to 350°F (175°C).
- Step 2: Grease your 9x9 inch baking dish lightly with butter or line it with parchment paper.
- Step 3: In a mixing bowl, combine flour, powdered sugar, and a dash of salt. Add cold butter and mix until coarse crumbs. Press into the bottom of the baking dish.
- Step 4: In another bowl, mix blueberries with sugar and lemon juice. Optionally add cornstarch.
- Step 5: Spread the blueberry mixture evenly over the crust.
- Step 6: In the same bowl, combine flour, powdered sugar, and remaining cold butter for streusel. Mix until crumbly and sprinkle over the blueberries.
- Step 7: Bake for 30-35 minutes until topping is golden and blueberries are bubbling.
- Step 8: Cool completely in the dish, then cut into squares and serve.
Equipment
- 9x9-inch Baking Dish
- Mixing Bowls
- Whisk or fork
- Spatula
Notes
- Use cold butter for a flaky crust.
- Don't overmix the streusel; it should be crumbly.
- Adjust sweetness based on blueberry sweetness.
- Cool bars completely for best cutting results.
